Deferred Share Plan Release

RNS Number : 0092U

National Grid PLC

16 June 2009

National Grid plc (National Grid)

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Notification of Directors' Interests
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Deferred Share Plan-2006 Award Release

Earlier today, the Trustee of the National Grid Group Employee Share Trust confirmed that the 2006 awards made to Executive Directors under the National Grid Deferred Share Plan were released on the third anniversary (15 June 2009) of the date of the awards in accordance with the plan rules. In each case the number of shares transferred to participants by the Trustee, as follows, are net of statutory deductions.

Director	Number of Shares
Mark Fairbairn	6,363
Steve Holliday	21,439
Steve Lucas	20,551
Nick Winser	18,450

Note: Mark Fairbairn has advised the company that, in accordance with DTR3 and Section 253 Companies Act 2006; his total interest includes a further 2,723 shares released by the Trustee under the Plan for his partner.

National Grid Executive Share Option Scheme

In addition, the Trustee of the National Grid 1996 Group Employee Share Trust (ESOP) confirmed that, earlier today, Mark Fairbairn exercised options over 2,180 NG. ordinary shares granted to him in July 1999 at 435.75p per share, and 31,152 NG ordinary shares granted in June 2002 at 481.50p per share, under the National Grid Executive Share Option Scheme. 2,126 of these shares are retained by him, after sale of 31,206 NG ordinary shares, at a price of 539.5p today, to meet exercise costs and statutory deductions.

Note: Mark Fairbairn has advised the company that, in accordance with DTR3 and Section 253 Companies Act 2006; his total interest includes a further 1,623 shares released by the Trustee under the Scheme for his partner.

The total share interests of the above directors, following these changes, are: