Total Voting Rights

National Grid PLC
31 July 2007



31 July 2007

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

In conformity with the Transparency Directive's transitional provision 6 we
would like to notify the market of the following:

National Grid plc's registered capital as of 31 July 2007 consists of
2,656,395,076 ordinary shares, of which 13,905,602 had been purchased in the
market and registered as Treasury Shares; leaving a balance of 2,642,489,474
shares with voting rights.

This also follows National Grid having  transferred 13,519 shares held in
Treasury to employee share scheme participants earlier today.

The figure of 2,642,489,474 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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