Transaction in Own Shares

National Grid PLC
04 February 2008

National Grid plc - Transaction in Own Shares



4 February 2008



National Grid plc announces that on 1 February 2008 it purchased 422,409 of its
ordinary shares at a price of 778.0905 pence per share from Morgan Stanley
Securities Limited. The purchased shares will be held as Treasury shares.



Following the purchase of these shares, the number of ordinary shares with
voting rights in issue (excluding Treasury shares) will be 2,532,951,847 and the
number of ordinary shares in Treasury will be 48,961,669.





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