Medium Term Note Programme

National Grid PLC
21 March 2007


                              National Grid plc

                        EURO MEDIUM TERM NOTE PROGRAMME


National Grid plc announces that it has today issued EUR 250,000,000 4.125 per
cent Instruments due 2013, Series No 25 Tranche 2, as part of the National Grid
plc / National Grid Electricity Transmission plc EUR 12,000,000,000 Euro Medium
Term Note Programme.


21 March 2007


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Clive Hawkins            020 7004 3147

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Andrew Kluth             020 7004 3365


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