Holding(s) in Company

Northumbrian Water Group PLC
04 July 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

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.

       Non-beneficial interest.  Subsidiary companies of Amvescap have a larger number of portfolio management clients
       for whom they act as investment manager and investment advisor and by virtue of Section 203 of the Companies Act
       1985 Amvescap is deemed to have the same interest in the shares.

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

         59,092,500   - Vidacos Nominees Limited*
           8,095,000   - HSBC Nominees Limited
           3,210,000   - Bank of New York Nominees Limited
           1,707,500   - Chase Nominees Limited
           1,100,000   -  Northern Trust Nominees Limited
                  2,000   -  CM Investment Nominees Limited
        *  This holding includes the following:  Invesco Perpetual High Income Fund holds 35,700,700 (6.88%)
5.     Number of shares/amount of stock acquired

       1,050,000

6.     Percentage of issued class

       0.2%

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

       17th June 2003

11.    Date company informed

       20th June 2003

12.    Total holding following this notification

       73,207,000

13.    Total percentage holding of issued class following this notification

       14.11%

14.    Any additional information

15.    Name of contact and telephone number for queries

       Chris Green, 0191 301 6461

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

       Chris Green, Finance Director

Date of notification:   4th July 2003




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