Total Voting Rights

National Grid PLC
01 May 2008

1 May 2008



National Grid plc (National Grid)



Voting Rights and Capital update



National Grid has been notified that 125,224 shares held in Treasury were
transferred late yesterday to share scheme participants. Following this change,
National Grid plc's registered capital at close of 30 April 2008 consists of
2,581,913,516 ordinary shares, of which 78,242,605 have been purchased in the
market and registered as Treasury Shares; leaving a balance of 2,503,670,911
shares with voting rights.



The figure of 2,503,670,911 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 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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