Purchase of Own Securities

National Grid Transco PLC 03 March 2003 Announcement Dated: 3 March 2003 National Grid Transco - repurchase of shares National Grid Transco plc announces that on 28 February 2003 it purchased for cancellation 950,000 of its ordinary shares at a price of 401.9134 pence per ordinary share. Enquiries: Investors Marcy Reed +44 (0)20 7004 3170 +44 (0)7768 490807 (m) Terry McCormick +44 (0)20 7004 3171 +44 (0)7768 045139 (m) Louise Clamp +44 (0)20 7004 3172 +44 (0)7768 555641 (m) Media Gillian Home +44 (0)20 7004 3150 Jim Willison +44 (0)20 7004 3149 Clive Hawkins +44 (0)20 7004 3147 This information is provided by RNS The company news service from the London Stock Exchange
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