LTIS Operation

National Grid Transco PLC
22 March 2004

22 March 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 today 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 4,487 shares by
participants on 19 and 22 March 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 396,300 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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