Update on KeySpan Acquisition

National Grid PLC
13 July 2007


13 July 2007

                               National Grid plc

                 UPDATE ON NATIONAL GRID ACQUISITION OF KEYSPAN


National Grid is pleased to announce that the New Hampshire Public Utilities
Commission (NHPUC) has issued an order approving the acquisition of KeySpan.
This order follows the settlement in principle previously announced on 27 April
2007.


The sole remaining approval for the acquisition is authorisation by the New York
Public Service Commission (NYPSC). National Grid announced on 6 July 2007 that
it had reached an agreement in principle with the staff of the New York State
Department of Public Service and several other parties regarding the acquisition
of KeySpan, the latest procedural schedule indicates that the merger approval
will be placed before the NYPSC for a vote as on 22 August. Subject to an
approval vote, completion of the acquisition is expected shortly thereafter.


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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