Performance Share Plan

RNS Number : 6361U

National Grid PLC

26 June 2009

26th June 2009

National Grid plc (National Grid )

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Notification of Directors' Interests
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Performance Share Plan

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On 25 June 2009, the following directors were granted an award of shares in National Grid plc (the 'Shares') under the National Grid Performance Share Plan, calculated by reference to a share price of 540.3773p and an ADS shares price of $44.1091. The extent to which awards will vest will depend upon the company's performance against the relevant conditions. Subject to performance, the shares will vest in June 2012 and will be transferred to participants net of deductions on 25 June 2013.

	Director	Number of Shares/ADSs*
1.	Steve Holliday	342,353
2.	Steve Lucas	194,308
3.	Mark Fairbairn	170,991
4.	Nick Winser	171,102
5.	Tom King	47,609*

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

	Director	Number of Shares/ADSs*
1.	Steve Holliday	1,434,922
2.	Steve Lucas	964,629
3.	Mark Fairbairn	680,081
4.	Nick Winser	823,339
5.	Tom King	*156,124