Directors Technical interests

National Grid PLC
04 July 2006

4 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 yesterday 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 purchase of a further 125,000 NG shares yesterday, at a
market price of 589.0p per share, Steve Lucas, together with other employees
formerly with Lattice Group, have a technical interest in the new balance of
162,315 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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