LTIS Operation

National Grid Transco PLC
28 April 2004

28 April 2004

National Grid Transco plc (NGT)

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Interests Notified by the Trustee for the Lattice Group Long Term Incentive
Scheme (the 'LTIS')

(Notification of Directors' Technical Interests, Pursuant to Section 324(2) of
the Companies Act 1985)

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NGT yesterday received a notification from Mourant & Co. Trustees, as Trustee of
the Lattice Group Employees Share Trust operated in conjunction with the LTIS.
Following the exercise, and disposal or transfer, of 1,948 shares by
participants on 26 and 27 April 2004, the following Executive Director of NGT,
Steve Lucas, together with other employees formerly with Lattice Group, have a
technical interest in the remaining balance of 393,454 NGT shares held by the
Trustee.

(Note: For Companies Act purposes, Steve Lucas is deemed to have a technical
interest in all the shares held by the LTIS Trustee, together with all
participating employees. The interest ceases when shares are transferred to
participants by the exercise of LTIS options.)

Contact: D C Forward, Assistant Secretary (020 7004 3226)




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