Holding(s) in Company

National Grid PLC
29 July 2005



National Grid plc ('NG.')
29 July 2005

Notification of Interest in NG Ordinary Shares, Pursuant to Sections 198 to 208
of The Companies Act 1985
-------------------------------------------------------------------


National Grid plc yesterday received a further notification from Barclays PLC,
that it had a notifiable interest in 4.60% of NG ordinary shares (142,293,508
shares) at 22 July 2005.


                      This information is provided by RNS
            The company news service from the London Stock Exchange