Holding(s) in Company

RNS Number:8219R
Ecofin Water & Power Opps PLC
23 February 2007

TR-1:  NOTIFICATION OF MAJOR INTERESTS IN SHARES



1. Identity of the issuer or the underlying issuer of existing shares to which
voting rights are attached:

ECOFIN WATER & POWER OPPORTUNITIES PLC



2. Reason for the notification: (please state Yes / No)



An acquisition or disposal of voting rights: (  Yes  )



An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached: (    )



An event changing the breakdown of voting rights: (    )



Other (please specify) : (    )



3. Full name of person(s) subject to the notification obligation:

UTILICO INVESTMENT TRUST PLC



4. Full name of shareholder(s) (if different from 3.):

Not advised



5. Date of the transaction (and date on which the threshold is crossed or
reached if different):

22 February 2007



6. Date on which issuer notified:



23 February 2007



7. Threshold(s) that is/are crossed or reached:

30%



8. Notified details:





A: Voting rights attached to shares


Class/type of shares if possible              Situation previous to the Triggering transaction
using the ISIN CODE
                                  Number of shares                   Number of voting Rights

Capital 0.1p                       5,956,934                         5,956,934
 GB0031326431



Resulting situation after the triggering transaction:


Class/type of shares if      Number of shares         Number of voting rights           % of voting rights
possible using the ISIN CODE
Capital 0.1p                 Direct                   Direct       Indirect             Direct      Indirect

                             5,656,934                                                  29.3        0

                                                       5,656,934    0
  GB0031326431



B: Financial Instruments

Resulting situation after the triggering transaction


Type of         Expiration Date      Exercise/Conversion       Number of voting rights     % of voting rights
financial                            Period/ Date              that may be acquired if the
instrument                                                     instrument is exercised/
                                                               converted.






Total (A+B)
Number of voting rights        % of voting rights
 5,656,934                      29.3



9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable:

Utilico Investment Trust plc.



Proxy Voting:



10. Name of the proxy holder:

Utilico Investment Trust plc



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. Additional information:



.................



14. Contact name:

Phoenix Administration Services Ltd

Company Secretary  for Ecofin Water & Power Opportunities Plc





15. Contact telephone number:

[phone]





Annex to Notification Of Major Interests In Shares *



A: Identity of the person or legal entity subject to the notification obligation





*  This annex is only required to be filed with the competent authority.


                      This information is provided by RNS
            The company news service from the London Stock Exchange
END

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