Holding(s) in Company

9 December 2005

                                 ITM Power plc                                 

                              Holding in Company                               

NOTIFICATIONS UNDER SECTIONS 198 TO 202 - - U.K. COMPANIES ACT

1. Company in which shares are held: ITM Power plc

2. Notifiable Interest: Ordinary Shares of 5p each

(A) FMR Corp.

82 Devonshire Street
Boston, MA 02109

Parent holding company of Fidelity Management & Research Company (FMRCO),
investment manager for US mutual funds, and Fidelity Management Trust Company
(FMTC), a US state chartered bank which acts as a trustee or investment manager
of various pension and trust accounts. (See Schedule A for listing of
Registered Shareholders and their holdings).

(B) Fidelity International Limited (FIL)

P.O. Box HM 670
Hamilton HMCX, Bermuda

Parent holding company for various direct and indirect subsidiaries, including
Fidelity Investment Services Ltd (FISL), Fidelity Gestion (FIGEST), Fidelity
Investments Advisory (Korea) Limited (FIA(K)L), Fidelity Investments Management
(Hong Kong) Limited (FIMHK), Fidelity Pension Management (FPM), Fidelity
Investments Japan (FIJ) and Fidelity Investments International (FII),
investment managers for various non-US investment companies and institutional
clients.

3. The notifiable interests also comprise the notifiable interest of:

Mr. Edward C. Johnson 3d
82 Devonshire Street
Boston, MA 02109

A principal shareholder of FMR Corp. and Fidelity International Limited.

4. The notifiable interests include interest held on behalf of authorised unit
trust schemes in the U.K., notwithstanding the exemption from reporting
pursuant to Section 209 (1)(h) of the Companies Act 1985.

5. These notifications of disclosable interests constitute separate
notifications of interest in the shares and are combined solely for the
purposes of clarity and efficiency. Nothing herein should be taken to indicate
that FMR Corp. and its direct and indirect subsidiaries, Fidelity International
Limited and its direct and indirect subsidiaries or Mr. Edward C. Johnson 3d
act as a group or in concert in respect of the disclosed interests, or that
they are required to submit these notifications on a joint basis.

6. The disclosable interests arise under section 208 (4)(b) of the Act, namely
where a person, not being the registered holder, is entitled to exercise a
right conferred by the holding of the shares or to control the exercise of such
rights, or under section 203 of the Act respectively.

Schedule A

Security: ITM Power plc

Shares Held              Management   Nominee/Registered Name                  
                           Company                                             
                                                                               
                 10,700      N/A      N/A                                      
                                                                               
                562,300      FPM      NORTHERN TRUST LONDON                    
                                                                               
                210,500      FPM      BANK OF NEW YORK BRUSSELS                
                                                                               
                193,100      FPM      MELLON BANK                              
                                                                               
                 98,500      FPM      STATE STREET BANK & TRUST CO LDN         
                                                                               
                 52,000      FPM      CLYDESDALE BANK PLC                      
                                                                               
              4,471,500     FMRCO     MELLON BANK N.A.                         
                                                                               
                881,610     FISL      JP MORGAN, BOURNEMOUTH                   
                                                                               
              1,072,100      FIL      BROWN BROS HARRIMAN LTD LUX              
      
                                                                         
Total Ordinary Shares held:           7,552,310                                
Total Shares in issue:                91,893,250                               
Current ownership percentage:         8.22%                                    
Change in holding since last filing:  +1,079,800                               
                                                                               
Date company notified:                9 December 2005