Total Voting Rights

National Grid PLC
03 September 2007

3 September 2007



National Grid plc



Voting rights and capital - update



In conformity with the Transparency Directive's transitional provision 6,
National Grid plc would like to notify the market of the following:



National Grid plc's registered ordinary share capital as of 31 August 2007
consisted of 2,626,019,076 shares, of which 13,846,048 had been purchased in the
market and registered as treasury shares, leaving a balance of 2,612,173,028
shares with voting rights.



The figure of 2,612,173,028 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 the 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 of shares being repurchased and the supporting details will
indicate resultant share capital after market settlement and cancellation, or
transfer to treasury, of the shares involved (and any earlier repurchases that
remain to be registered).


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