Holding(s) in Company

Northumbrian Water Group PLC
03 August 2005


                                  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 discretionary managed clients

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

As 2

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

Not disclosed

5. Number of shares / amount of stock acquired

N/A

6. Percentage of issued class

N/A

7. Number of shares / amount of stock disposed

2,375,000

8. Percentage of issued class

Not disclosed

9. Class of security

Ordinary 10p shares

10. Date of transaction

2 August 2005

11. Date company informed

3 August 2005

12. Total holding following this notification

96,897,098

13. Total percentage holding of issued class following this notification

18.68%

14. Any additional information

N/A

15. Name of contact and telephone number for queries

Martin Parker, Company Secretary, 0191 301 6746

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

Martin Parker, Company Secretary

Date of notification: 3 August 2005

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