National Grid Renames its Subsidiary Businesses

10 October 2005

National Grid plc today announced that its principal businesses will now operate under one unifying name, National Grid. This completes the renaming programme initiated at the company's AGM in July 2005, when shareholders approved the Group name change.

The new name and identity incorporate National Grid's UK and US regulated electricity and gas businesses, wireless infrastructure operations, metering, LNG importation and property businesses, and the Basslink electricity interconnector project in Australia.

Previous Registered Name	New Registered Name	Trading as
National Grid Transco plc	National Grid plc	National Grid
National Grid Company plc	National Grid Electricity Transmission plc	National Grid
Transco plc	National Grid Gas plc	National Grid
Massachusetts Electric Company / Niagara Mohawk Power Corporation/ The Narragansett Electric Company/ Nantucket Electric Company/Granite State Electric Company/New England Power Company	Company names remain unaltered	National Grid
Crown Castle UK Limited	National Grid Wireless Limited	National Grid Wireless
Grain LNG Limited	National Grid Grain LNG Limited	National Grid
Secondsite Property Portfolio Limited	National Grid Property Limited	National Grid
Transco Metering Services Limited	National Grid Metering Limited	National Grid Metering
Basslink Pty Limited	National Grid Australia Pty Limited	National Grid

Roger Urwin, Group Chief Executive, said, "Following the corporate activity of the last 12 months or so, including the sale of four UK gas networks and acquisition of Crown Castle UK, this is a significant step bringing together our businesses under a consistent, unified identity. This and our substantial investment programmes emphasise our Group-wide commitment to delivering services safely, responsibly, reliably and efficiently."

- End -

For further information contact:

National Grid:

Clive Hawkins	+44 (0)207 0043147	+44 (0) 7836 357173 (m)
Stewart Larque	+44 (0)1926 655274	+44 (0) 7831 864034 (m)
Louise Farrell	+44 (0)1926 655373	+44 (0) 7974 949989 (m)

Citigate Dewe Rogerson:

General number	+44 (0)20 7638 9571
Anthony Carlisle	+44 (0)7973 611888 (m)

Photographs of new identity can be found on www.newscast.co.uk

Notes to Editors:

Previous name	Business Overview	New registered name	Trading as
National Grid Transco plc*	Parent Group (LSE: NG. / NYSE: NGG) - One of the world's largest utilities, focused on delivering energy safely, reliably and efficiently. - Businesses also operating in related areas such as wireless infrastructure for broadcast and telecommunications, property, LNG importation, metering and interconnectors.	National Grid plc www.nationalgrid.com	National Grid
National Grid Company plc*	UK Electricity transmission - System Operator for Great Britain - Transmission Owner in England and Wales - 4,500 miles of overhead lines, 22,000 towers and 340 substations	National Grid Electricity Transmission plc www.nationalgrid.com/uk	National Grid
Transco plc	UK Gas transmission - System Operator for Great Britain - Transmission owner for Great Britain - 4,300 miles of high pressure pipeline + 7 coastal terminals UK Gas Distribution - Distributes gas on behalf of shipper/suppliers to 11 million consumers - 82,000 miles of pipeline - Distribution network covers approx 50% of UK consumers - Manages National Gas Emergency Call Centre: Tel - 0800 111999	National Grid Gas plc www.nationalgrid.com/uk	National Grid
Massachusetts Electric Company	US Northeast region electricity transmission, distribution and gas distribution companies - Electricity transmission - 9000 miles of overhead line - Electricity distribution - around 3.3 million electricity customers Gas distribution - around 565,000 customers	Working name - National Grid Company Registered names do not alter www.nationalgrid.com/us	National Grid
The Narragansett Electric Company
Nantucket Electric Company
Niagara Mohawk Power Corporation
Granite State Electric Company
New England Power Company
Crown Castle UK Limited	UK Wireless infrastructure - Largest independent provider of infrastructure to UK mobile telecommunications operators - UK infrastructure provider for radio/TV analogue and digital broadcast	National Grid Wireless Limited** www.nationalgrid.com/wireless	National Grid Wireless
SecondSite Property Portfolio Limited	UK Property Management - Remediation and disposal of surplus non-operational properties	National Grid Property Limited** www.nationalgrid.com/property	National Grid
Grain LNG Limited	LNG Importation Terminal - Isle of Grain, Kent - First new UK LNG importation terminal in operation for 20 years. - Phase 1 of terminal completed; phase 2 underway to enlarge terminal as part of £500m on-site development	National Grid Grain LNG Limited** www.nationalgrid.com/grainlng	National Grid
Transco Metering Service Limited	UK Metering business - Maintains over 20 million gas meters across GB - Gas meter-reading contracts with major energy suppliers	National Grid Metering Limited** www.nationalgrid.com/uk/metering	National Grid Metering
Basslink Pty Limited	Electricity Interconnector project - Connecting Tasmania to national electricity market on mainland Australia - £300m investment	National Grid Australia Pty Limited** www.nationalgrid.com/australia	National Grid

*Name changed on 26 July 2005
**Information on subsidiary businesses can be found at www.nationalgrid.com