Publication of Prospectus

National Grid PLC 10 January 2007 Publication of Final Terms The following final terms has been approved by the UK Listing Authority and is available for viewing: Final Terms in relation to the National Grid plc's issue of USD 100,000,000 Floating Rate Instruments due 11 January 2011 under the National Grid plc / National Grid Electricity Transmission plc Euro 12,000,000,000 Euro Medium Term Note Programme To view the full document, please paste the following URL into the address bar of your browser. http://www.rns-pdf.londonstockexchange.com/rns/3221p_-2007-1-10.pdf For further information, please contact Investors Andrew Kluth Assistant Treasurer National Grid plc 1-3 Strand London WC2N 5EH Tel: +44 20 7004 3365 Fax: +44 20 7004 3363 Media Clive Hawkins Tel: +44 20 7004 3147 DISCLAIMER - INTENDED ADDRESSEES Please note that the information contained in the Final Terms may be addressed to and/or targeted at persons who are residents of particular countries (specified in the Prospectus for the National Grid plc / National Grid Electricity Transmission plc Euro 12,000,000,000 Euro Medium Term Note Programme dated 18 August 2005) only and is not intended for use and should not be relied upon by any person outside these countries. Prior to relying on the information contained in the Final Terms you must ascertain from the Prospectus whether or not you are part of the intended addressees of the information contained therein. Your right to access this service is conditional upon complying with the above requirement. This information is provided by RNS The company news service from the London Stock Exchange
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