Holding(s) in Company

National Grid PLC
30 November 2006



National Grid plc ('NG.')
30 November 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 3.99% of NG.
ordinary shares (108,685,736 shares) at 28 November 2006 (having previously
notified a 4.00% interest at 24 November 2006).


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