Medium Term Note Programme

National Grid PLC
11 January 2007

                               National Grid plc


                        EURO MEDIUM TERM NOTE PROGRAMME



National Grid plc announces that it has today issued USD 100,000,000 Floating
Rate Instruments due 11 January 2011 Series No 43, as part of the National Grid
plc and National Grid Electricity Transmission plc EUR 12,000,000,000 Euro
Medium Term Note Programme.



11 January 2007



Enquires:

Media
Clive Hawkins            [phone]

Investors
Andrew Kluth             [phone]






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