<SEC-DOCUMENT>0000832988-20-000279.txt : 20200929
<SEC-HEADER>0000832988-20-000279.hdr.sgml : 20200929
<ACCEPTANCE-DATETIME>20200929174843
ACCESSION NUMBER:		0000832988-20-000279
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200925
FILED AS OF DATE:		20200929
DATE AS OF CHANGE:		20200929

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MCCOLLAM SHARON
		CENTRAL INDEX KEY:			0001225930

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32349
		FILM NUMBER:		201209943

	MAIL ADDRESS:	
		STREET 1:		C/O OFFICEMAX INCORPORATED
		STREET 2:		263 SHUMAN BLVD.
		CITY:			NAPERVILLE
		STATE:			IL
		ZIP:			60563

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SIGNET JEWELERS LTD
		CENTRAL INDEX KEY:			0000832988
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-JEWELRY STORES [5944]
		IRS NUMBER:				000000000
		FISCAL YEAR END:			0201

	BUSINESS ADDRESS:	
		STREET 1:		CLARENDON HOUSE
		STREET 2:		2 CHURCH STREET
		CITY:			HAMILTON
		STATE:			D0
		ZIP:			HM11
		BUSINESS PHONE:		44-207-317-9700

	MAIL ADDRESS:	
		STREET 1:		C/O 15 GOLDEN SQUARE
		CITY:			LONDON
		STATE:			X0
		ZIP:			W1F9JG

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SIGNET GROUP PLC
		DATE OF NAME CHANGE:	19931213

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RATNERS GROUP PLC
		DATE OF NAME CHANGE:	19931213
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_160141610912579.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-09-25</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000832988</issuerCik>
        <issuerName>SIGNET JEWELERS LTD</issuerName>
        <issuerTradingSymbol>SIG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001225930</rptOwnerCik>
            <rptOwnerName>MCCOLLAM SHARON</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>CLARENDON HOUSE</rptOwnerStreet1>
            <rptOwnerStreet2>2 CHURCH STREET</rptOwnerStreet2>
            <rptOwnerCity>HAMILTON</rptOwnerCity>
            <rptOwnerState>D0</rptOwnerState>
            <rptOwnerZipCode>HM11</rptOwnerZipCode>
            <rptOwnerStateDescription>BERMUDA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares, par value $0.18</value>
            </securityTitle>
            <transactionDate>
                <value>2020-09-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>937</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>18980</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Reflects the number of common shares issued in lieu of the reporting person's quarterly board retainer fees that were temporarily reduced in response to the ongoing financial impact of the COVID-19 pandemic. Such common shares were issued in accordance with the Signet Jewelers Limited 2018 Omnibus Incentive Plan and were fully vested on the date of issuance.</footnote>
        <footnote id="F2">Includes 5,952 restricted stock units, which are subject to certain vesting and forfeiture provisions.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>J. Matthew Shady, Attorney in Fact</signatureName>
        <signatureDate>2020-09-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
