Quest Operation

National Grid Transco PLC
13 June 2005

National Grid Transco plc (NGT)

Monday 13 June 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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Last Friday, 10 June 2005, 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 1,689,977 NGT Ordinary shares, by virtue of the Quest
transferring the shares to some 850 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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