Quest Operation

National Grid Transco PLC
18 July 2005

National Grid Transco plc (NGT)

Monday 18 July 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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Today, each of the following NGT Executive Directors: E M Astle, S J Holliday, S
Lucas, N P Winser, and R J Urwin, technically ceased to be interested in 22,713
NGT 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 NGT'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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