Holding(s) in Company

ITM Power PLC
03 September 2004


                   NOTIFICATION OF MAJOR INTERESTS IN SHARES



1. Name of company


ITM POWER PLC



2. Name of shareholder having a major interest


CARMIGNAC GESTION



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


SHAREHOLDER NAMED ABOVE



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


CARMIGNAC EURO-INVESTISSEMENT       1.725M

CARMIGNAC EURO-ENTREPRENEURS        0.805M

CARMIGNAC TECHNOLOGIES              0.72M

CARMIGNAC INFOTECH                  0.28M


5. Number of shares / amount of stock acquired


230,000 SHARES



6. Percentage of issued class


0.25%



7. Number of shares / amount of stock disposed


N/A



8. Percentage of issued class


N/A



9. Class of security


ORDINARY SHARES



10. Date of transaction


30 JULY 2004



11. Date company informed


1 SEPT 2004



12. Total holding following this notification


3.53M SHARES



13. Total percentage holding of issued class following this notification


3.86%



14. Any additional information


N/A



15. Name of contact and telephone number for queries


John Wreford, ITM Power plc   01780 740574



16. Name and signature of authorised company official responsible for making
this notification


John Wreford, Finance Director,  ITM Power plc



Date of notification


3rd September 2004


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