Directors Technical Interests

National Grid PLC
28 September 2006



28 September 2006



National Grid plc (NG)





Interests Notified by the Trustee of the National Grid plc Group Employee Share
Trust



(Notification of Directors' Technical Interests,

Pursuant to Section 324 (2) of the Companies Act 1985)



NG today received notifications from Towers Perrin Share Plan Services
(Guernsey) Limited, as Trustee of the National Grid plc Group Employee Share
Trust (the 'Trust'), operated in conjunction with National Grid Share Award Plan
2004 (the 'Plan'), Performance Share Plan, Share Matching Plan and Deferred
Share Plan. Following the purchase of 100,000 Ordinary shares yesterday, at a
market price of 650p per share for future releases under the Plan, and the
release to participants of 5,216 shares, also yesterday, Executive Directors of
NG (Roger Urwin, Steve Holliday, Steve Lucas, Mike Jesanis, Edward Astle and
Nick Winser) are deemed to have a technical interest in the new balance of
257,365 NG Ordinary shares held in Trust.   The B Shares held by the Trust
remain unchanged.



(Note: For Companies Act purposes, the Executive Directors of NG are deemed to
have a technical interest in all shares held in the Trust, together with all
participating employees. The interest ceases when shares are transferred to
participants by the release of shares from the Trust under the Performance Share
Plan.)





Contact D C Forward, Assistant Secretary (0207 004 3226)


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