Holding(s) in Company

RNS Number:6170S
International Power PLC
28 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                    74,677,942
(Designated & Undesignated)

Possfund (MAM) Nominees Limited              5,243,408

Britel (MAM) Nominees Limited                6,329,079

Merrill Lynch Pensions Nominees Limited

A/C NONCERT                                  6,001,031

Merrill Lynch Pensions Nominees Limited         5,000

Stamford Nominees

A/C CHARTY                                     350,800

Chase Nominees Limited                       7,005,548

Nortrust Nominees Limited                    5,685,075

Bank of New York Nominees Limited            3,724,918

Morgan Nominees Limited                        391,693

Other Names                                  9,188,778


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:

28 November 2003


12  Total holding following this notification:

118,603,272

13  Total percentage holding of issued class following this notification:

10.67%

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:

28 November 2003


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