Transaction in Own Shares

National Grid PLC 20 December 2007 National Grid plc - Transaction in Own Shares 20 December 2007 National Grid plc announces that on 19 December 2007 it purchased 598,964 of its ordinary shares at a price of 824.1921 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 2,550,960,878 and the number of ordinary shares in Treasury will be 30,952,638. End This information is provided by RNS The company news service from the London Stock Exchange
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