LTIS Operation

National Grid Transco PLC
02 February 2005

2 February 2005

National Grid Transco plc (NGT)

------------------------------------------------------------------------------

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)

------------------------------------------------------------------------------

NGT received a notification yesterday 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 17,653 shares by
participants on 1 February 2005, 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 106,096 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 (0207 004 3226)


                      This information is provided by RNS
            The company news service from the London Stock Exchange