Additional Listing

National Grid PLC
25 September 2007

National Grid plc



25th September 2007



Application has been made to the UK Listing Authority for the listing of
3,705,193 ordinary shares of 11 and 17/43 pence each in the Company to the
Official List and to the London Stock Exchange for these shares to be admitted
to trading.



These shares are issued and allotted following the conversion of all B shares
remaining in issue following the final repurchase offer made in July 2007. They
will rank pari passu with the existing shares in issue.


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