GridAmerica to cease

National Grid Transco PLC
26 April 2005

26 April 2005

GridAmerica to cease operations

National Grid USA and GridAmerica participants, FirstEnergy and Northern Indiana
Public Service Company, today jointly announce that all three companies have
agreed to cease GridAmerica operations effective 1 November 2005 utilising a
similar contractual provision that the other GridAmerica participant, Ameren,
exercised earlier this month.

GridAmerica, a subsidiary of National Grid Transco (NGT), is an independent
transmission company operating within the footprint of the Midwest Independent
Transmission System Operator, or Midwest ISO.

NGT is pleased with the performance of  GridAmerica over the past 18 months and
will be looking to reapply the skills and knowledge brought to its participation
in GridAmerica as it seeks to develop interests in North America.

Contacts

National Grid Transco

Investors
Alexandra Lewis          [phone]           [phone](m)
David Campbell           [phone]           [phone](m)
Richard Smith            [phone]           [phone](m)
Bob Seega (US)           [phone]

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

Citigate Dewe Rogerson                                 [phone]
Anthony Carlisle                                       [phone](m)

Cautionary statement

This announcement contains certain statements that are neither reported
financial results nor other historical information. These statements are
forward-looking statements within the meaning of Section 27A of the Securities
Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934,
as amended. Because these forward-looking statements are subject to assumptions,
risks and uncertainties, actual future results may differ materially from those
expressed in or implied by such statements. Many of these assumptions, risks and
uncertainties relate to factors that are beyond National Grid Transco's ability
to control or estimate precisely, such as delays in obtaining or adverse
conditions contained in regulatory approvals, competition and industry
restructuring, changes in economic conditions, currency fluctuations, changes in
interest and tax rates, changes in energy market prices, changes in historical
weather patterns, changes in laws, regulations or regulatory policies,
developments in legal or public policy doctrines, the impact of changes to
accounting standards, technological developments, the failure to retain key
management, the availability of new acquisition opportunities or the timing and
success of future acquisition opportunities. Other factors that could cause
actual results to differ materially from those described in this announcement
include the ability to continue to integrate the US and UK businesses acquired
by or merged with the Group, the failure for any reason to achieve reductions in
costs or to achieve operational efficiencies, unseasonable weather impacting on
demand for electricity and gas, the behaviour of UK electricity market
participants on system balancing, the timing of amendments in prices to shippers
in the UK gas market, the performance of National Grid Transco's pension schemes
and the regulatory treatment of pension costs, the impact of the proposed
disposal by National Grid Transco of 4 of its UK gas distribution network and
any adverse consequences arising from outages on or otherwise affecting energy
networks owned and/or operated by National Grid Transco.

For a more detailed description of these assumptions, risks and uncertainties,
together with any other risk factors, please see National Grid Transco's filings
with the United States Securities and Exchange Commission (and in particular the
'Risk Factors' and 'Operating and Financial Review' sections filed with its most
recent annual report on Form 20F). Recipients are cautioned not to place undue
reliance on these forward-looking statements, which speak only as of the date of
this announcement. National Grid Transco does not undertake any obligation to
release publicly any revisions to these forward-looking statements to reflect
events or circumstances after the date of this announcement.


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