Holding(s) in Company

National Grid PLC
06 December 2006



National Grid plc ('NG.')

6 December 2006


Notification of Interest in NG. Ordinary Shares, Pursuant to Section 198 of The
Companies Act 1985

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National Grid plc today received a further notification from Legal & General
Investment Management Limited; that its notifiable interest was in 4.04% of NG.
Ordinary shares

(110,018,971 shares) at 5 December (having previously notified a 3.99% interest
at 28 November 2006)




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