Total Voting Rights

National Grid PLC
25 September 2007

25 September 2007

National Grid plc (National Grid)

Voting Rights and Capital update

National Grid was notified late yesterday that 3,850 shares held in Treasury
were transferred to share scheme participants.  Following this change, National
Grid plc's registered capital consisted of 2,614,676,656 ordinary shares, of
which 13,597,636 have been purchased in the market and registered as Treasury
Shares; leaving a balance of 2,601,079,020 shares with voting rights.

The figure of 2,601,079,020 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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