Holding(s) in Company

National Grid PLC
11 October 2006

National Grid plc (NG)

11 October 2006


Notification of Interest in NG ordinary shares, pursuant to Sections 198 to 202
of The Companies Act 1985


NG today received notification from The Capital Group Companies, Inc. that its
notifiable interest had increased to 6.02% (163,935,501 ordinary shares) at 9
October 2006.

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