Director/PDMR Shareholding

National Grid PLC
09 March 2006

9 March 2006



National Grid plc (NG)



Directors' Interests in NG Ordinary Shares

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Edward Astle has today received confirmation that, having exercised Executive
Share Scheme options granted to him in December 2002 at 434.25p per share, over
74,841 NG shares, on 7 March, the shares were sold on that day at 594.5p per
share.



His total interest after this event is over 784,837 NG ordinary shares.


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