<SEC-DOCUMENT>0001654954-25-010181.txt : 20250829
<SEC-HEADER>0001654954-25-010181.hdr.sgml : 20250829
<ACCEPTANCE-DATETIME>20250829130635
ACCESSION NUMBER:		0001654954-25-010181
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250829
FILED AS OF DATE:		20250829
DATE AS OF CHANGE:		20250829

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NATIONAL GRID PLC
		CENTRAL INDEX KEY:			0001004315
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION [4922]
		ORGANIZATION NAME:           	01 Energy & Transportation
		EIN:				980367158
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14958
		FILM NUMBER:		251279076

	BUSINESS ADDRESS:	
		STREET 1:		1-3 STRAND
		CITY:			LONDON
		STATE:			X0
		ZIP:			WC2N 5EH
		BUSINESS PHONE:		(44) 207 004 3220

	MAIL ADDRESS:	
		STREET 1:		1-3 STRAND
		CITY:			LONDON
		STATE:			X0
		ZIP:			WC2N 5EH

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NATIONAL GRID TRANSCO PLC
		DATE OF NAME CHANGE:	20021121

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NATIONAL GRID GROUP PLC
		DATE OF NAME CHANGE:	19991007

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NATIONAL GRID HOLDING PLC
		DATE OF NAME CHANGE:	19991007
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>nationalgridplc-aug.htm
<DESCRIPTION>BATCH FILING
<TEXT>
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UNITED STATES</font></div>
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SECURITIES AND EXCHANGE COMMISSION</font></div>
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Washington D.C. 20549</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 24px">
FORM 6-K</font></div>
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REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934</font></div>
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Date: 29 August 2025</font></div>
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Commission File Number: 001-14958</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
NATIONAL GRID plc</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">(Translation
of registrant&#x2019;s name into English)</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
England and Wales</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">(Jurisdiction
of Incorporation)&#xA0;</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
1-3 Strand, London, WC2N 5EH, United Kingdom</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">(Address
of principal executive office)</font></div>
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<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Indicate
by check mark whether the registrant files or will file annual
reports under cover of Form 20-F or Form&#xA0;40-F.</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
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&#x2612;</font>&#xA0;&#xA0;Form&#xA0;20-F&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;<font>&#x2610;</font>&#xA0;&#xA0;Form&#xA0;40-F</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">Indicate
by check mark if the registrant is submitting the Form 6-K in paper
as permitted by Regulation S-T Rule
101(b)(1):&#xA0;&#xA0;<font>&#x2610;</font></font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">Indicate
by check mark if the registrant is submitting the Form 6-K in paper
as permitted by Regulation S-T Rule
101(b)(7):&#xA0;&#xA0;<font>&#x2610;</font></font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">Indicate
by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information
to the Commission pursuant to Rule 12g3- 2(b) under the Securities
Exchange Act of 1934.&#xA0;&#xA0;<font>&#x2610;</font>&#xA0;&#xA0;Yes&#xA0;&#xA0;&#xA0;&#xA0;<font>&#x2612;</font>&#xA0;&#xA0;No</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">If
&#x201C;Yes&#x201D; is marked, indicate below the file number
assigned to the registrant in connection with Rule 12g3-2(b):
n/a</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
EXHIBIT INDEX</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">Exhibit
No.</font></div>
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<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">Description</font><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
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<td style="vertical-align: top; width: 10%; border-top: 1px solid rgb(0, 0, 0); border-left: 1px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px; padding-bottom: 8px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">99.1</font></div>
</td>
<td style="vertical-align: top; width: 90%; border-top: 1px solid rgb(0, 0, 0); border-left: 1px solid rgb(0, 0, 0); border-right: 1px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px; padding-bottom: 8px;">
<font style="font-family: Times New Roman; font-size: 13px">Exhibit
99.1 Announcement sent to the London Stock Exchange on 01 August
2025<font style="color: #000000; background-color: #FFFFFF">&#xA0;</font>&#x2014;
Total Voting Rights</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 10%; border-top: 1px solid rgb(0, 0, 0); border-left: 1px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px; padding-bottom: 8px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">99.2</font></div>
</td>
<td style="vertical-align: top; width: 90%; border-top: 1px solid rgb(0, 0, 0); border-left: 1px solid rgb(0, 0, 0); border-right: 1px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px; padding-bottom: 8px;">
<font style="font-family: Times New Roman; font-size: 13px"><font style="font-size: 13px">Exhibit 99.2 Announcement sent to the London
Stock Exchange on 08 August 2025</font><font style="color: #000000; font-size: 13px; background-color: #FFFFFF">&#xA0;</font><font style="font-size: 13px">&#x2014;</font><font style="font-size: 13px">&#xA0;</font><font style="font-size: 13px">Director/PDMR
Shareholding</font></font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 10%; border-top: 1px solid rgb(0, 0, 0); border-bottom: 1px solid rgb(0, 0, 0); border-left: 1px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px; padding-bottom: 8px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">99.3</font></div>
</td>
<td style="vertical-align: top; width: 90%; border-width: 1px; border-style: solid; border-color: rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px; padding-bottom: 8px;">
<font style="font-family: Times New Roman; font-size: 13px">Exhibit
99.3 Announcement sent to the London Stock Exchange on 19 August
2025<font style="color: #000000; background-color: #FFFFFF">&#xA0;</font>&#x2014;
Publication of a Prospectus</font></div>
</td>
</tr></table>
</div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Exhibit
99.1</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
1 August 2025</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
National Grid plc&#xA0;('National
Grid'&#xA0;or&#xA0;'Company')</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
Voting Rights update</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
National Grid's registered capital as of 31 July 2025 consisted of
5,191,884,002 ordinary shares, of which,&#xA0;230,653,898 were held
as treasury shares; leaving a balance of 4,961,230,104 with voting
rights.</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px"><font style="color: #000000">
The figure of 4,961,230,104 may be used by shareholders as the
denominator for the calculations by which they will determine if
they are required</font><font style="color: #000000; font-family: Times New Roman">&#xA0;</font><font style="color: #000000">to
notify their interest in, or a change to their interest in,
National Grid under the FCA's Disclosure Guidance and Transparency
Rules.</font></font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Julian Baddeley</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Group Company Secretary</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Exhibit
99.2</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
8 August 2025</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 18px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
National Grid plc&#xA0;('National
Grid'&#xA0;or&#xA0;'Company')</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
Notification of Transactions of Persons Discharging Managerial
Responsibilities ('PDMRs')</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 18px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px"><font style="color: #000000; background-color: #FFFFFF">
This announcement is made in accordance with Article
19</font><font style="color: #000000; font-family: Times New Roman">&#xA0;</font><font style="color: #000000">of
the Market Abuse Regulation ('MAR'). In accordance with MAR, the
relevant Financial Conduct Authority ('FCA') notifications are set
out below.</font></font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: left">
<table cellpadding="0" cellspacing="0" style="text-align: left; width: 100%; font-family: Times New Roman; font-size: 13px; margin: 0px auto 0px 0px;">
<tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-top: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
1</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
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<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Details of the person discharging managerial responsibilities /
person closely associated</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Name</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<br></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">Andy
Agg</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
2</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 97%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Reason for the notification</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Position/status</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">Chief
Financial Officer</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
b)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Initial notification /Amendment</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">Initial
notification</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
3</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 97%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Details of the issuer, emission allowance market participant,
auction platform, auctioneer or auction monitor</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Name</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">National
Grid plc</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
b)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
LEI</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">8R95QZMKZLJX5Q2XR704</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
4</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 97%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Details of the transaction(s): section to be repeated for (i) each
type of instrument; (ii) each type of transaction; (iii) each date;
and (iv) each place where transactions have been
conducted</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Description of the financial instrument, type of
instrument</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Identification code</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Ordinary shares of 12 204/473p each</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
GB00BDR05C01</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
b)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Nature of the transaction</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Monthly purchase of securities ("partnership shares") under the
Share Incentive Plan</font></div>
</td>
</tr><tr>
<td rowspan="2" style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
c)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td rowspan="2" style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Price(s) and volume(s)</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 32%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Price(s)</font></div>
</td>
<td style="vertical-align: top; width: 32%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Volume(s)</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 32%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
GBP 10.7067</font></div>
</td>
<td style="vertical-align: top; width: 32%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
14</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
d)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Aggregated information</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
- Aggregated volume</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
- Price</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
e)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Date of the transaction</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">2025.08.07</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
f)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Place of the transaction</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">London
Stock Exchange (XLON)</font></div>
</td>
</tr></table>
</div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: left">
<table cellpadding="0" cellspacing="0" style="text-align: left; width: 100%; font-family: Times New Roman; font-size: 13px; margin: 0px auto 0px 0px;">
<tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-top: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
1</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 97%; border-width: 0.5pt 0.5pt 2px; border-style: solid; border-color: rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Details of the person discharging managerial responsibilities /
person closely associated</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Name</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">John
Pettigrew</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
2</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 97%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Reason for the notification</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Position/status</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">Chief
Executive</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
b)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Initial notification /Amendment</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">Initial
notification</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
3</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 97%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Details of the issuer, emission allowance market participant,
auction platform, auctioneer or auction monitor</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Name</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">National
Grid plc</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
b)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
LEI</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">8R95QZMKZLJX5Q2XR704</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
4</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 97%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Details of the transaction(s): section to be repeated for (i) each
type of instrument; (ii) each type of transaction; (iii) each date;
and (iv) each place where transactions have been
conducted</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Description of the financial instrument, type of
instrument</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Identification code</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Ordinary shares of 12 204/473p each</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
GB00BDR05C01</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
b)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Nature of the transaction</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Monthly purchase of securities ("partnership shares") under the
Share Incentive Plan</font></div>
</td>
</tr><tr>
<td rowspan="2" style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
c)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td rowspan="2" style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Price(s) and volume(s)</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 32%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Price(s)</font></div>
</td>
<td style="vertical-align: top; width: 32%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Volume(s)</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 32%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
GBP 10.7067</font><font style="font-family: Times New Roman; font-size: 13px;">&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 32%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
14</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
d)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Aggregated information</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
- Aggregated volume</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
- Price</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
e)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Date of the transaction</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">2025.08.07</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
f)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 33%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Place of the transaction</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 64%; border-left: 0.5pt solid rgb(0, 0, 0); border-right: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">London
Stock Exchange (XLON)</font></div>
</td>
</tr></table>
</div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: left">
<table cellpadding="0" cellspacing="0" style="text-align: left; width: 100%; font-family: Times New Roman; font-size: 13px; margin: 0px auto 0px 0px;">
<tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-top: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
1</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 96%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-top: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Details of the person discharging managerial responsibilities /
person closely associated</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Name</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 62%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">Will
Serle</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
2</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 96%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Reason for the notification</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Position/status</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 62%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">Chief
People Officer</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
b)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Initial notification /Amendment</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 62%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">Initial
notification</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
3</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 96%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Details of the issuer, emission allowance market participant,
auction platform, auctioneer or auction monitor</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Name</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 62%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">National
Grid plc</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
b)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
LEI</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 62%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">8R95QZMKZLJX5Q2XR704</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
4</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="3" style="vertical-align: top; width: 96%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
Details of the transaction(s): section to be repeated for (i) each
type of instrument; (ii) each type of transaction; (iii) each date;
and (iv) each place where transactions have been
conducted</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
a)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Description of the financial instrument, type of
instrument</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Identification code</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 62%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Ordinary shares of 12 204/473p each</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
GB00BDR05C01</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
b)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Nature of the transaction</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 62%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Monthly purchase of securities ("partnership shares") under the
Share Incentive Plan</font></div>
</td>
</tr><tr>
<td rowspan="2" style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
c)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td rowspan="2" style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Price(s) and volume(s)</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 31%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Price(s)</font></div>
</td>
<td style="vertical-align: top; width: 31%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Volume(s)</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 31%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
GBP 10.7067</font></div>
</td>
<td style="vertical-align: top; width: 31%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
14</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
d)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Aggregated information</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
- Aggregated volume</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
- Price</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
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<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
e)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Date of the transaction</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 62%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">2025.08.07</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 3%; border-left: 0.5pt solid rgb(0, 0, 0); border-bottom: 2px solid rgb(0, 0, 0);">
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
f)</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 34%; border-left: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Place of the transaction</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: top; width: 62%; border-left: 0.5pt solid #000000; border-right: 0.5pt solid #000000; border-bottom: 2px solid #000000">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px;">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">London
Stock Exchange (XLON)</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr></table>
</div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Exhibit
99.3</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
19th August 2025</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
National Grid plc / National Grid Electricity Transmission
plc</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #005199; font-family: Times New Roman; font-size: 13px">
Publication of a Prospectus</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
The following prospectus has been approved by the Financial Conduct
Authority and is available for viewing:</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-style: italic; font-family: Times New Roman; font-size: 13px">
<font style="color: #000000">The Prospectus dated 19 August 2025
(the "</font><font style="font-weight: bold; color: #000000">Prospectus</font><font style="color: #000000">") for the National Grid plc and National Grid
Electricity Transmission plc Euro 20,000,000,000 Euro Medium Term
Note Programme.</font></font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
To view the full document, please paste the following URL into the
address bar of your browser:</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
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<font style="text-decoration: underline; color: #0000FF; font-family: Times New Roman; font-size: 13px">
http://www.rns-pdf.londonstockexchange.com/rns/9476V_1-2025-8-19.pdf</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px"><font style="color: #000000">
A copy of the Prospectus has been submitted to the National Storage
Mechanism and will shortly be available to the public for
inspection at&#xA0;</font><font style="font-style: italic; text-decoration: underline; color: #0000FF">https://data.fca.org.uk/#/nsm/nationalstoragemechanism</font><font style="color: #000000">.</font></font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
For further information, please contact:</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: left">
<table cellpadding="0" cellspacing="0" style="text-align: left; width: 40%; font-family: Times New Roman; font-size: 13px; margin: 0px auto 0px 0px;">
<tr>
<td style="vertical-align: top; width: 59%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Kwok Liu</font></div>
</td>
<td style="vertical-align: top; width: 41%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px"><font style="color: #000000">
+44 (0) 7900 405 729</font><font style="color: #000000; font-size: 13px">&#xA0;</font><font style="color: #000000">(m)</font></font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 59%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Deputy Treasurer, Funding &amp; Investment</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
National Grid plc</font></div>
</td>
<td style="vertical-align: top; width: 41%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 59%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 41%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 59%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Ben Trounson</font></div>
</td>
<td style="vertical-align: top; width: 41%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
+1 (929) 585 0339</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 59%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Head of Media - Corporate Affairs</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
National Grid plc</font></div>
</td>
<td style="vertical-align: top; width: 41%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr></table>
</div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
&#xA0;</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; color: #000000; font-family: Times New Roman; font-size: 13px">
DISCLAIMER - INTENDED ADDRESSEES</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Please note that the information contained in the Prospectus may be
addressed to and/or targeted at persons who are residents of
particular countries (specified in the Prospectus) only and is not
intended for use and should not be relied upon by any person
outside these countries and/or to whom the offer contained in the
Prospectus is not addressed. Prior to relying on the information
contained in the Prospectus you must ascertain from the Prospectus
whether or not you are part of the intended addressees of the
information contained therein.</font></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Your right to access this service is conditional upon complying
with the above requirement.</font></div>
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<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; font-family: Times New Roman; font-size: 13px">
SIGNATURE</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: center; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Pursuant to the requirements of the Securities Exchange Act of
1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly
authorized.</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div>
<table cellpadding="0" cellspacing="0" style="width: 100%; font-family: Times New Roman; font-size: 13px">
<tr>
<td style="vertical-align: top; width: 75%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
<td colspan="2" style="vertical-align: bottom; width: 25%">
<div style="text-align: left; margin-left: 24px; margin-right: 0px; text-indent: -12px">
<font style="font-family: Times New Roman; font-size: 13px">NATIONAL GRID
plc</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 75%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
<td style="vertical-align: bottom; width: 6%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
<td style="vertical-align: bottom; width: 19%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 75%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 6%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; font-style: italic; color: #000000; font-family: Times New Roman; font-size: 13px">
By:</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 19%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-weight: bold; font-style: italic; color: #000000; font-family: Times New Roman; font-size: 13px">
Beth Melges</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr><tr>
<td style="vertical-align: top; width: 75%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
<td style="vertical-align: bottom; width: 6%">
<div><font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
<td style="vertical-align: top; width: 19%">
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Beth Melges</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="color: #000000; font-family: Times New Roman; font-size: 13px">
Head of Plc Governance</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
</td>
</tr></table>
</div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">&#xA0;</font></div>
<div style="text-align: justify; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<br></div>
<div><font style="font-family: Times New Roman; font-size: 10">&#xA0;</font></div>
<div style="text-align: left; margin-left: 0px; margin-right: 0px; text-indent: 0px">
<font style="font-family: Times New Roman; font-size: 13px">Date:<font style="color: #000000; background-color: #FFFFFF">&#xA0;</font>29
August 2025</font></div>
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