Mailing to NMK shareholders

National Grid Group PLC
28 December 2001


   National Grid Mails Forms of Election to Shareholders of Niagara Mohawk

National Grid Group plc announced today that it has mailed Forms of Election
to shareholders of Niagara Mohawk Holdings, Inc. (Niagara Mohawk) in
connection with its acquisition of Niagara Mohawk. The acquisition is subject
to approval by the required Securities and Exchange Commission and is expected
to be completed in early 2002.



ENQUIRIES:

National Grid:

Investors

Marcy Reed [phone] [phone](m)

Terry McCormick [phone] [phone](m)

Media

Susan Stevens [phone] [phone](m)

Clive Hawkins [phone] [phone](m)

Citigate Dewe Rogerson: [phone]

Anthony Carlisle [phone](m)