RNS Number:0718I
International Power PLC
27 February 2003



Schedule 10 - Notification of Major Interests in Shares




1   Name of company:


International Power plc



2   Name of shareholder having a major interest:



Merrill Lynch Investment Managers Limited




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 above





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



Nutraco Nominees Limited

(Designated & Undesignated)                 70,168,564

Merrill Lynch Pensions Nominees Limited

A/C NONCERT                                  5,659,643

Merrill Lynch Pensions Nominees Limited          5,000

Treasury of the Government
of the Isle of Man

A/C 5                                          545,362

Treasury of the Government
of the Isle of Man

A/C 10                                         242,131

Chase Nominees Limited                      14,551,458

Nortrust Nominees Limited                   11,258,911

Bank of New York Nominees Limited            8,201,355


Junction Nominees Limited                   13,508,768

State Street Nominees Limited                1,781,924

Morgan Nominees Limited                        347,584

Mellon Nominees Limited                        472,727

Other Names                                  7,657,294


5   Number of shares/amount of stock acquired:


Not known



6   Percentage of issued class:



Not known



7   Number of shares/amount of stock disposed:



Not known



8   Percentage of issued class:



Not known





9   Class of security:



Ordinary shares of 50 pence each





10  Date of transaction:



Not known





11  Date company informed:



27 February 2003





12  Total holding following this notification:



134,400,721



13  Total percentage holding of issued class following this notification:



12.02%





14  Contact name for queries:



1.  Investors                             Grant Jones

2.  Media                               Aarti Singhal





15 Contact telephone number:



1.  44-207-320-8619

2.  44-207-320-8681





16  Name of company official responsible for making notification:



Stephen Ramsay - Company Secretary





17  Date of notification:



27 February 2003




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