Holding(s) in Company

Northumbrian Water Group PLC
20 November 2007


                          NORTHUMBRIAN WATER GROUP PLC

TR-1 NOTIFICATION OF MAJOR INTERESTS IN SHARES
1. Identity of the issuer or the underlying issuer of        Northumbrian Water
existing shares to which voting rights are attached          Group plc
2. Reason for the notification                               Acquisition of
                                                             voting rights
3. Full name of person(s) subject to the notification        Legal & General
obligation                                                   Group plc (L&G)
4. Full name of shareholder(s) (if different from 3)         As above
5. Date of the transaction (and date on which the threshold  14 November 2007
is crossed or reached if different)
6. Date on which issuer notified:                            20 November 2007
7. Threshold(s) that is/are crossed or reached:              Above 3%
8. Notified details:

A: Voting rights attached to shares
Class/type   Situation       Resulting situation after the Triggering transaction
of shares if previous to the
possible     Triggering
using the    transaction
ISIN CODE    Number Number   Number of     Number of voting       % of voting
             of     of       shares        rights                 rights
             Shares Voting
                    Rights

                             Direct        Direct        Indirect Direct  Indirect
ORD GBP 0.10 Below 3%        15,822,517    15,882,517             3.05%
GB0033029744

B: Financial Instruments
Resulting situation after the triggering transaction
Type of      Expiration Exercise/     Number of voting rights that may   % of
financial    Date       Conversion    be acquired if the instrument is   voting
instrument              Period/Date   exercised/converted                rights


N/A          N/A        N/A           N/A                                N/A

Total (A+B)
Number of voting rights                      % of voting rights
15,822,517                                   3.05%

9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable
Legal & General Group plc (Direct and Indirect) (Group)
Legal & General Investment Management (Holdings) Limited
(LGIMH) (Direct and Indirect)
Legal & General Investment Management Limited (Indirect) (LGIM)
Legal & General Group plc (Direct) (L&G) (15,822,517 - 3.05% = LGAS, LGPL & PMC)
Legal & General Investment Management (Holdings) Limited (Direct) (LGIMHD)
Legal & General Insurance Holdings Limited (Direct) (LGIH)
Legal & General Assurance (Pensions Management) Limited (PMC)
Legal & General Assurance Society Limited (LGAS & LGPL)
Legal & General Pensions Limited (Direct) (LGPL)

Proxy Voting:
10. Name of the proxy holder:                                              N/A
11. Number of voting rights proxy holder will cease to hold:               N/A
12. Date on which proxy holder will cease to hold voting rights:           N/A

13.          Notification using the total voting rights figure of 518,623,845.
Additional
information:
             Please note this notification has been delayed due to the large
             number of disclosures required following a substantial amount of
             new business which has come to L&G in the form of an in-specie
             transfer.
14. Contact  Kate Alsop, Assistant Company Secretary, Northumbrian Water Group
information: plc
15. Contact
telephone
number:      0191 301 6701




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