National Grid The power of action

National Grid normally pays dividends twice each year, in accordance with the timetable here. We encourage shareholders to elect to have their dividends paid to them direct to their bank or building society account. As well as being convenient for the shareholder, as the dividend will normally reach their account on the day of payment, there will be no delays from paying in or losing cheques. Alternatively, shareholders can elect to acquire further National Grid ordinary shares without payment of dealing or stamp duty reserve tax through the Scrip Dividend Scheme, details and an application form are available from our Registrar, Capita, or, for the scrip for American Depositary Receipt holders, Bank of New York Mellon, whose contact information are on the back cover. Ordinary shareholders can also elect via the website www.nationalgridshareholders.com.

More information about National Grid, and specifically for shareholders, is available on the National Grid website at www.nationalgrid.com. We encourage shareholders to receive documents electronically via the website and suggest registering an email address via www.nationalgridshareholders.com. Shareholders then receive an email alert when shareholder documents become available on the website and a link directly to them.

The Shareholder Networking programme aims to provide UK resident shareholders with a better understanding of the Company. The programme, which is normally run twice a year over two days, includes visits to UK operational sites and presentations by senior managers and employees. The costs of the programme (including shareholder travel to and from the event) are paid for by National Grid. Participation is by application and selection by ballot from those applying, with priority given to those who have not recently attended.

If you would like to take part, please write to:

Shareholder Networking Organiser
National Grid House
Warwick Technology Park
Gallows Hill
Warwick CV34 6DA

A share dealing service is available from Capita Registrars. For more information please call 0871 664 0445 (8am – 4.30pm) or visit www.capitadeal.com. Calls are charged at 10p per minute plus network extras. High street banks may also offer share dealing services. Corporate ISAs for National Grid shares are available from Stocktrade. For more information, call Stocktrade on 0131 240 0443 or write to Stocktrade, 81 George Street, Edinburgh EH2 3ES.

If you hold only a few shares and feel that it is uneconomical or otherwise not worthwhile to sell them, you could consider donating your shares to charity. ShareGift is an independent registered charity (no. 1052686) that provides a free service for shareholders wishing to give holdings of shares to benefit charitable causes. For more information please visit www.sharegift.org or call Capita Registrars.

These details are provided for information only and any action you take is at your own risk. National Grid cannot advise you on what action, if any, you should take in respect of your shares. If you have any doubt as to the action you should take, you are recommended to seek your own financial advice from your stockbroker, bank manager, accountant or other independent financial advisor authorised pursuant to the Financial Services and Markets Act 2000.

The securities offered pursuant to the rights issue have not been and will not be registered under the US Securities Act of 1933 and may not be offered or sold in the United States unless in a transaction that is registered thereunder or exempt from the registration requirements thereof. No public offer has been or will be made in or into the United States.

Some of the key dates and actions in the history of National Grid are listed below. The full history of the Company goes back much further. For example, the first national gas company in the UK commenced operations in 1812.

CGT information relating to National Grid shares can be found on our website under investors or obtained from Capita Registrars. Share prices on specific dates can also be found on our website at www.nationalgrid.com/shareholders.

The following table includes a brief analysis of shareholder numbers and shareholdings as at 31 March 2010: