Dividend Reinvestment

National Grid PLC
24 August 2007



National Grid plc ('NG')
24 August 2007


Notification of Directors' Interests:


NG late yesterday received notification that, following the operation of
dividend reinvestment (the shares were purchased at 715p per share on 22 August
2007):

In the Lattice Group All Employee Share Ownership Plan, Steve Lucas became
interested in an additional 22 ordinary shares;

In the National Grid Share Incentive Plan, Mark Fairbairn became interested in
an additional 26 ordinary shares. And in the National Grid Share Matching Plan,
Mark Fairbairn became interested in an additional 93 ordinary shares.


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