Holding(s) in Company

RNS Number:2021S
International Power PLC
18 November 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                    71,837,383

(Designated & Undesignated)



Possfund (MAM) Nominees Limited              3,375,882



Britel (MAM) Nominees Limited                4,106,075



Merrill Lynch Pensions Nominees Limited

A/C NONCERT                                  6,106,250



Merrill Lynch Pensions Nominees Limited         5,000



Treasury of the Government

of the Isle of Man

A/C 5                                          177,731



Treasury of the Government

of the Isle of Man

A/C 10                                          82,166



Stamford Nominees

A/C CHARTY                                     308,500



Chase Nominees Limited                       7,005,548



Nortrust Nominees Limited                    5,574,793



Bank of New York Nominees Limited            3,763,717



Morgan Nominees Limited                        557,654



Other Names                                  9,313,836







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:



18 November 2003





12  Total holding following this notification:



112,214,535



13  Total percentage holding of issued class following this notification:



10.08%



14  Contact name for queries:



Aarti Singhal





15 Contact telephone number:



44-207-320-8681





16  Name of company official responsible for making notification:



Stephen Ramsay - Company Secretary





17  Date of notification:



18 November 2003




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