Holding(s) in Company

Northumbrian Water Group PLC
22 April 2005


                          Northumbrian Water Group plc
                                  (the Company)

                               Holding in Company

In accordance with Sections 198 to 202 of the Companies Act 1985, the Company
was notified on 21 April 2005 by Ontario Teachers' Pension Plan Board that as at
21 April 2005 it had acquired an interest in 129,655,961 shares of the Company
representing 25% of the issued share capital.

Name of contact and telephone number for queries

Martin Parker
Company Secretary
Tel: [phone]




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