Quest operation

National Grid PLC
04 October 2005


National Grid plc (NG)
4 October 2005


QUALIFYING EMPLOYEE SHARE OWNERSHIP TRUST (Quest)
(Notification of Directors' Interests pursuant to Section 324(2)
of the Companies Act 1985)

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Yesterday, each of the following NG Executive Directors: E M Astle, S J Holliday,
S Lucas, N P Winser and R J Urwin, technically ceased to be interested in 42,061
NG Ordinary shares, by virtue of the Quest transferring the shares to employees.

(Note: For Companies Act purposes, the Executive Directors named above are
deemed to have a technical interest in the shares held in NG's Quest, together
with all participating employees. The interest ceases when shares are
transferred to participants who exercise their Sharesave scheme options.)

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


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