Director/PDMR Shareholding

National Grid PLC
13 July 2006



13 July 2006



National Grid plc (NG)



Director's Interests in NG Ordinary Shares

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National Grid Share Matching Plan



The Trustee of the National Grid 1996 Employee Benefit Trust (ESOP) has today
confirmed that 3,937 shares were transferred to Nick Winser on exercising the
Sharematch award (at a total exercise price of £1) granted to him under the
National Grid Share Matching Scheme operation in June 2003. These shares are
retained by him and his total interest is unchanged.



(Note: For Companies Act purposes, certain Executive Directors of NG
(E Astle, S Holliday, S Lucas, R Urwin and N Winser) are deemed to have a
technical interest in all the shares held by the ESOP, together with all
participating employees. The joint interest ceases on those shares on transfer
to individual participants by the exercise of executive share options or under
another employees' share scheme.)



Contact: D C Forward, Assistant Secretary (0207 004 3226).


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