Acquisition of KeySpan

National Grid PLC
24 August 2007


24 August 2007
                               National Grid plc

                    COMPLETION OF THE ACQUISITION OF KEYSPAN


National Grid is pleased to announce that it has completed the acquisition of
KeySpan.


Contacts

National Grid:

Investors
David Rees         [phone]      [phone] (m)
Richard Smith      [phone]      [phone] (m)
James Waite        [phone]      [phone] (m)

Media
Clive Hawkins      [phone]      [phone] (m)

Brunswick:
Paul Scott         [phone]      [phone](m)



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