Director's Technical Interest

National Grid PLC
09 September 2005


National Grid plc (NG)

Friday 9 September 2005

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

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

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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 implementation of the Return of Cash to Shareholders (further
details of which are contained in the Circular to Shareholders dated 6 June
2005) and the admission of New Ordinary Shares and B Shares in National Grid plc
to the Official List on 1 August 2005, the Trustee purchased shares to enable
the Trust to meet future share releases.  The following Executive Director of
NG, Steve Lucas, together with other employees formerly with Lattice Group, has
a technical interest in the balance of 101,057 NG 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: Helen Richardson, Assistant Secretary (020 7004 3228)


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