Holding(s) in Company

Northumbrian Water Group PLC
29 March 2004

                                  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

       510,000

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

       25 March 2004

11.    Date company informed

       26 March 2004

12.    Total holding following this notification

       62,785,000

13.    Total percentage holding of issued class following this notification

       12.11%

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: 29 March 2004




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