Response to media speculation

National Grid Transco PLC 25 June 2004 National Grid Transco plc For Immediate Release 25 June 2004 Media Speculation on Potential Acquisition of Crown Castle's UK Towers Business National Grid Transco ('NGT') notes recent speculation regarding a potential acquisition of the UK operations of Crown Castle International Corp ('Crown Castle'). NGT confirms that it has entered into discussions with Crown Castle. Further announcements will be made as appropriate. CONTACT DETAILS National Grid Transco: Investors Marcy Reed +44 (0)20 7004 3170 +44 (0)7768 490807(m) Alexandra Morton +44 (0)20 7004 3368 +44 (0)7768 554879(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 Clive Hawkins +44 (0)20 7004 3147 +44 (0) 7836 357173(m) Citigate Dewe Rogerson +44 (0)20 7638 9571 Anthony Carlisle +44 (0)7973 611888(m) This information is provided by RNS The company news service from the London Stock Exchange
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