Holding(s) in Company

Northumbrian Water Group PLC
25 August 2006


                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

All relevant boxes should be completed in block capital letters.

  1.  Name of listed company              2.  Name of shareholder with a major
                                              interest

      Northumbrian Water Group plc            Barclays PLC

  3.  Please state whether notification   4.  Name of the registered holder(s)
      indicates that it is regarding          and, if more than one holder, the
      the holding of the shareholder          number of shares held by each of
      named in 2 above; in respect of a       them
      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 above                              See schedule below

  5.  Number of      6.  Percentage of    7.  Number of        8.  Percentage of
      shares/amount      issued class         shares/amount        issued class
      of stock           (any treasury        of stock             (any treasury
      acquired           shares held by       disposed             shares held by
                         the listed                                the listed
                         company should                            company should
                         not be taken                              not be taken
                         into account                              into account
                         when                                      when
                         calculating                               calculating
                         percentage)                               percentage)

      Not disclosed      Not disclosed        Not disclosed        Not disclosed

  9.  Class of security                  10.  Date of         11.  Date listed
                                              transaction          company
                                                                   informed

      Ordinary 10 pence shares                21 August 2006       25 August 2006

 12   Total holding following this       13   Total percentage holding of issued
      notification                            class following this notification
                                              (any treasury shares held by the
                                              listed company should not be taken
                                              into account when calculating
                                              percentage) 3.84%

       19,904,997

  14   Any additional                     15  Name of contact and telephone
       information                            number for queries: Jayne

                                                   Powell, 0191 3016704
       Legal Entity report shown
       below


Name and signature of duly authorised officer of the listed company responsible
for making this notification: Jayne Powell, Assistant Company Secretary

Date of notification: 25 August 2006

SCHEDULE OF REGISTERED HOLDERS
Registered Name                                                    Shares held
Bank of Ireland a/c 426353                                             852,521
Barclays Bank PLC (Singapore)                                            3,500
Barclays Capital Nominees Limited                                      205,000
Barclays Capital Nominees Limited                                      285,304
Barclays Capital Nominees Limited                                      819,710
Barclays Trust Co E99                                                    3,872
Barclays Trust Co R69                                                    1,300
BNP Paribas                                                             36,958
Boiss Nominees Ltd 4224361                                             364,160
Chase Nominees Ltd 16376                                               196,332
Chase Nominees Ltd 20947                                             8,509,167
Chase Nominees Ltd 21359                                               410,537
Chase Nominees Ltd 28270                                                96,431
Chase Nominees Ltd 28270                                               136,343
CIBC Mellon Global Securities                                           42,459
Investors Bank and Trust Co                                          1,648,973
Investors Bank and Trust Co                                             61,812
Investors Bank and Trust Co                                            701,283
Investors Bank and Trust Co                                            419,221
Investors Bank and Trust Co                                             28,931
JP Morgan (BGI Custody) 16331                                           88,970
JP Morgan (BGI Custody) 16341                                          218,033
JP Morgan (BGI Custody) 16341                                          225,250
JP Morgan (BGI Custody) 16344                                           94,098
JP Morgan (BGI Custody) 16345                                          155,159
JP Morgan (BGI Custody) 16400                                        3,118,518
JP Morgan (BGI Custody) 18409                                          298,241
JP Morgan Chase Bank                                                   232,221
Mellon Trust US Custodian                                               80,223
Mellon Trust of New England                                             48,429
Northern Trust Bank - BGI SEPA                                         120,453
Northern Trust Bank - BGI SEPA                                          79,847
Northern Trust Bank - BGI SEPA                                          20,656
R C Greig Nominees Ltd                                                  21,100
R C Greig Nominees Ltd a/c BL1                                           2,815
R C Greig Nominees Ltd a/c CM1                                           3,115
R C Greig Nominees Ltd a/c SA1                                           3,000
State Street Bank & Trust - WI                                          45,343
State Street Boston                                                     86,386
State Street Trust of Canada                                            81,669
The Northern Trust Company - U                                          57,657
                                                  TOTAL             19,904,997

LEGAL ENTITY REPORT
Legal Entity                                        Holding    Percentage held
Barclays Global Investors Limited                13,749,476             2.6511
Barclays Capital Inc                                205,000             0.0395
Barclays Global Investors Australia Limited         232,221             0.0448
Barclays Bank Trust Company Limited                   5,172             0.0010
Barclays Private Bank and Trust Limited               3,500             0.0007
Barclays Capital Securities Limited               1,105,014             0.2131
Gerrard Limited                                      30,030             0.0058
Barclays Life Assurance Co Limited                1,014,284             0.1956
Barclays Global Investors, N.A.                   3,560,300             0.6865
Group Holding                                    19,904,997             3.8381





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