Directors Technical Interests

National Grid PLC
13 July 2006

Thursday 13 July 2006
National Grid plc (NG)

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Interests Notified by the Trustee of the
Lattice Group Employee Share Ownership Trust

(Notification of Directors' Technical Interests,
Pursuant to Section 324(2) of the Companies Act 1985)
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NG today received a notification from Lattice Group Trustees Limited, as Trustee
of the Lattice Group Employee Share Ownership Trust (the 'Trust'), operated in
conjunction with the Lattice Group Short Term Incentive Scheme (the 'Scheme').
Following the transfer of 137,481 NG shares to participants on 13 July 2006,
Steve Lucas, together with other employees formerly with Lattice Group, have a
technical interest in the new balance of 24,834 NG shares held in the Trust.

(Note: For Companies Act purposes, Steve Lucas is deemed to have a technical
interest in all the shares held in this Trust, together with all participating
employees. The interest ceases when shares are transferred to participants under
the rules of the Scheme.)

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


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