Transaction in Own Shares

National Grid PLC
07 June 2007



National Grid plc

7 June 2007

National Grid plc announces that on 6 June 2007 it purchased for cancellation
2,000,000 of its ordinary shares at a price of 751.33 pence per share from
Deutsche Bank AG London Branch.

Following the purchase and upon the cancellation of these shares, the number of
ordinary shares with voting rights in issue will be 2,692,203,394.





                      This information is provided by RNS
            The company news service from the London Stock Exchange