5 December 2014
National Grid plc (National Grid)
Notification of Major Interest in National Grid Ordinary Shares
National Grid has received a notification on Form TR-1 from The Capital Group Companies, Inc. that its total interest in National Grid voting ordinary shares was, at 3 December 2014, at 6.85%, a total of 258,130,404 shares (previously notified at 27 November 2014, at 7.9087%, a total of 297,861,156 shares).
This notice is in compliance with National Grid's obligations under the Disclosure and Transparency Rules.
David Whincup
Company Secretarial Assistant
0207 004 3209