Deferred Share Plan

RNS Number : 9306T

National Grid PLC

15 June 2009

Monday 15th June 2009

National Grid plc (National Grid )

_____________________________________________________________

Notification of Directors' Interests
____________________________________________________________

Deferred Share Plan

Late on Friday 12 June, the Trustee of the National Grid Employee Share Trust notified the Company that, on 11 June 2009, the following directors were granted an award of Ordinary shares in National Grid (the 'Shares') or American Depositary Shares (ADS's) under the National Grid Deferred Share Plan, calculated by reference to a share price of 541.14p or an ADS price of $44.8371. The awards will vest on the third anniversary of the date of grant (June 2012). The shares will be transferred to participants as soon as practicable thereafter. Tom King's award will be released net of US statutory deductions.

Director	Number of ADS's
Tom King	12,080

The following awards to UK directors are over forfeitable shares. These directors have elected to pay the income tax and national insurance contributions ('Tax Liability') due in respect of the awards on grant and the awards have therefore been granted after taking account of the tax liability. The Company has arranged for the tax liability to be settled on behalf of the under mentioned directors.