Holding(s) in Company

National Grid PLC
18 September 2006

National Grid plc

18 August 2006



Notification of Interest in National Grid plc ordinary shares;

Pursuant to Section 198 of The Companies Act 1985.



National Grid plc received notification from Fidelity International Limited ('
FIL') on Friday 15 September 2006, that it, and its direct and indirect
subsidiaries, no longer had a notifiable interest in National Grid plc ordinary
shares.  FIL's holding having reduced from 3.03% (82,537,325 shares) to 2.99%
(81,411,368 shares).




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