Total Voting Rights

National Grid PLC
01 April 2008


1 April 2008


National Grid plc


Voting rights and capital - update

National Grid plc's registered ordinary share capital as at close of 31 March
2008 consisted of 2,581,913,516 shares, of which 66,696,328 have been purchased
in the market and registered as treasury shares, leaving a balance of
2,515,217,188 shares with voting rights.

The figure of 2,515,217,188 may be used by shareholders as the denominator for
the calculations by which they will determine if they are required to notify
their interests in, or a change to their interest in, National Grid plc under
the 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 transfer to Treasury, or cancellation,
of the shares involved (and any earlier repurchases which remain to be
registered).


Contact: D C Forward,
Assistant Secretary
0207 004 3226




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