Total Voting Rights

National Grid PLC
01 October 2007


1 October 2007


National Grid plc


Voting rights and capital - update


In conformity with the Transparency Directive, National Grid plc would like to
notify the market of the following:

National Grid plc's registered ordinary share capital as of 28 and 30 September
2007 consisted of 2,614,895,915 shares, of which 13,597,636 had been purchased
in the market and registered as treasury shares, leaving a balance of
2,601,298,279 shares with voting rights.

This figure includes the 3,705,193 ordinary shares issued and allotted on 28
September 2007 in respect of the conversion of all B shares remaining in issue
following the final repurchase offer.

The figure of 2,601,298,279 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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