Dividend Reinvestment

National Grid PLC
26 January 2007

National Grid plc ('NG')
26 January 2007




Notification of Directors' Interests:


NG yesterday received notification that, following the operation of dividend
reinvestment (the shares were purchased at 756.5p per share on 24 January 2007):


In the Lattice Group All Employee Share Ownership Plan, Steve Lucas became
interested in an additional 12 ordinary shares;


In the National Grid Share Incentive Plan, Mark Fairbairn became interested in
an additional 13 ordinary shares. And in the National Grid Share Matching Plan,
Mark Fairbairn became interested in an additional 53 ordinary shares.




Notification of Directors' Technical Interests, Pursuant to Section 324(2) of
the Companies Act 1985:


NG yesterday received a notification from Towers Perrin Share Plan Services
(Guernsey) Limited, as Trustee of both the National Grid Group Employee Share
Trust and The National Grid plc 1996 Employee Benefit Trust (holding shares in
conjunction with the Share Matching Plan), that following the purchase set out
below, Steve Holliday, Steve Lucas, Nick Winser, Mark Fairbairn and Edward Astle
are deemed to have a technical interest in the new balance as follows:


Trust                 Shares      Price    Date Purchased      Balance of shares
                      purchased                                held in trust

National Grid Group   240         756.5p   24/01/07            224,423 
Employee Share Trust                                           Ordinary shares

                                                               14,855
                                                               B shares
                                                               (unchanged)






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