Total Voting Rights

National Grid PLC
21 August 2007


21 August 2007

National Grid plc (NG.) - Voting Rights and Capital- Update

Today, National Grid transferred 14,315 shares held in Treasury to employee
share scheme participants. Following this change, National Grid plc's registered
capital consists of 2,635,325,076 ordinary shares, of which 13,876,812 have been
purchased in the market and registered as Treasury Shares; leaving a balance of
2,621,448,264 shares with voting rights.

The figure of 2,621,448,264 may be used by shareholders as the denominator for
the calculations by which they will determine if they are required to notify
their interest in, or a change to their interest in, National Grid plc under the
FSA's Disclosure and Transparency Rules.

Note: This notification confirms actual capital as recorded on the register at
the above date, allowing for changes recorded since the last notification.
National Grid is currently undertaking a share repurchase programme. Where
repurchases are made, separate covering announcements will, as required,
identify numbers being repurchased and the supporting details indicate resultant
share capital after market settlement and cancellation, or transfer to Treasury,
of the shares involved (and any earlier repurchases which remain to be
registered).


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