Director/PDMR Shareholding

National Grid PLC
01 September 2005

National Grid plc (NG)
1 September 2005
Notification of Directors' Interests

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The Trustee of the National Grid USA Incentive Thrift Plan (the 'Thrift Plan')
notified NG yesterday that:

The interest of Mr M Jesanis in NG shares in the Thrift Plan was increased by
reinvestment of the August 2005 NG final dividend received, as follows:

20.7149 Ordinary Share ADRs on 25 August 2004 at US$47.635 per ADR.


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