Holding(s) in Company

Northumbrian Water Group PLC
21 November 2003

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES


1.     Name of company

       Northumbrian Water Group plc

2.     Name of shareholder having a major interest

       Amvescap plc as agent for INVESCO UK ICVC Series

3.     Please state whether notification indicates that it is in respect of holding of the shareholder named in 2 above
       or in respect of a non-beneficial interest or in the case of an individual holder if it is a holding of that
       person's spouse or children under the age of 18.

       INVESCO UK ICVC Series

4.     Name of the registered holder(s) and, if more than one holder, the number of shares held by each of them

       Vidacos Nominees Limited

5.     Number of shares/amount of stock acquired

       750,000

6.     Percentage of issued class

       Not disclosed

7.     Number of shares/amount of stock disposed

       N/A

8.     Percentage of issued class

       N/A

9.     Class of security

       Ordinary 10p Shares

10.    Date of transaction

       19 November 2003

11.    Date company informed

       20 November 2003

12.    Total holding following this notification

       57,350,000

13.    Total percentage holding of issued class following this notification

       11.06

14.    Any additional information

15.    Name of contact and telephone number for queries

       Toni Simpson, 0191 301 6704

16.    Name and signature of authorised company official responsible for making this notification.

       Toni Simpson

Date of notification:   21 November 2003




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