Holding(s) in Company

National Grid Transco PLC
17 December 2004



17th December 2004

National Grid Transco plc (NGT)

Notification of Interest in NGT Ordinary Shares,

Pursuant to Section 198 of The Companies Act 1985

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NGT today received a notification from Credit Suisse First Boston group that its
total interest was 3.24% (100,029,895 shares) at 14 December 2004. (Included in
this disclosure are 49,132,828 shares with an interest under Section 208(5) of
the Companies Act, by virtue of the right to re-delivery of equivalent
securities under stock lending arrangements.)


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