Director/PDMR Shareholding

National Grid PLC
20 June 2007

20th June 2007



Director's Interests in National Grid plc (NG.) Ordinary Shares

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National Grid Share Matching Plan



Today, the Trustee of the National Grid 1996 Group Employee Share Trust (ESOP)
confirmed that, on 19 June 2007, Mark Fairbairn exercised the matching award,
over 4,897 NG. ordinary shares, granted to him under the National Grid Share
Matching Scheme operation in May 2004 (at nil cost to exercise). 2,885 of these
shares are retained by him, after disposing of 2,012 NG ordinary shares, at a
price of 743.5p yesterday, to meet statutory deductions.



Mark Fairbairn's total interest after this event is over 257,366 ordinary
shares.


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