KeySpan acquisition update

National Grid PLC
27 April 2007


27 April 2007

                               National Grid plc

                 UPDATE ON NATIONAL GRID ACQUISITION OF KEYSPAN


National Grid is pleased to announce that it has reached agreement in principle
with the staff of the New Hampshire Public Utilities Commission and the Office
of Consumer Advocate in New Hampshire on the acquisition of KeySpan.


Formal filing of the settlement is expected to take place in mid May, along with
testimony from National Grid and the New Hampshire Public Utilities Commission
staff. The filed agreement must be approved by the New Hampshire Public
Utilities Commission. Full terms of the settlement will be publicly available at
that time.


Subject to the above statements, the sole remaining approval for the acquisition
is authorisation by the New York Public Service Commission (NYPSC).


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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