Director/PDMR Shareholding

RNS Number : 1501T

National Grid PLC

01 June 2009

Monday 1 June 2009

National Grid plc (National Grid)

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Notification of Directors' Interests
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Deferred Share Plan

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On 12 June 2008, Bob Catell was granted an award over 7,225 National Grid American Depositary Shares ('ADS's) under the National Grid Deferred Share Plan (the 'Plan'). Such awards would normally be released on the third anniversary of the date of grant, net of relevant statutory deductions. However, following his retirement as an Executive Director on 31 March 2009, the award vested in full under the Plan rules. The Trustee confirmed late on Friday 29 May that, after US statutory deductions and based on a price of $48.59 per ADS, the net release amounting to 4,483 ADSs was transferred to the beneficial holding of Mr Catell on 28 May 2009.