Holding(s) in Company

National Grid PLC
20 December 2007





National Grid plc (NG.)



20th December 2007



Notification of Major Interest in NG. Ordinary Shares



NG late yesterday received from Legal & General Group Plc (L&G) a further
Notification; that L&G's total group position (direct and indirect interests)
was in 5.56% of NG voting ordinary shares (142,237,289 shares) at 12 December
2007 of which the group's direct interest was in 5.09% (130,211,472 shares).



(Note: L&G previously notified its total group position interest was in 5.1% of
NG voting ordinary shares (132,566,418 shares) at 1 October 2007.)



This notice is given in fulfilment of National Grid plc's obligation under the
DTR requirements.




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