Holding(s) in Company

22 March 2006

                                 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                                             
                                                                               
                278,300      FPM      NORTHERN TRUST LONDON                    
                 96,800      FPM      MELLON BANK                              
                 51,100      FPM      STATE STREET BANK & TRUST CO LDN         
                 26,500      FPM      CLYDESDALE BANK PLC                      
              4,077,600     FMRCO     MELLON BANK N.A.                         
              2,025,464     FISL      JP MORGAN, BOURNEMOUTH                   
                735,200      FIL      BROWN BROS HARRIMAN LTD LUX              
                113,700      FIL      JP MORGAN, BOURNEMOUTH                   
                                                                               
Total Ordinary Shares held:           7,404,664                                
Total Shares in issue:                91,972,250                               
Current ownership percentage:         8.05%                                    
Change in holding since last filing:  +118,600                                 
                                                                               
Date of transaction:                  17 March 2006                            
Date company notified:                20 March 2006                            


ITM were subsequently notified of the following changes to Fidelity's holding,
giving them a revised holding of 7.32%:

Shares Held              Management   Nominee/Registered Name                  
                           Company                                             
                                                                               
                278,300      FPM      NORTHERN TRUST LONDON                    
                 92,400      FPM      MELLON BANK                              
                 51,100      FPM      STATE STREET BANK & TRUST CO LDN         
                 26,500      FPM      CLYDESDALE BANK PLC                      
              3,527,600     FMRCO     MELLON BANK N.A.                         
              1,933,164     FISL      JP MORGAN, BOURNEMOUTH                   
                706,900      FIL      BROWN BROS HARRIMAN LTD LUX              
                113,700      FIL      JP MORGAN, BOURNEMOUTH                   
                                                                               
Total Ordinary Shares held:           6,729,664                                
Total Shares in issue:                91,972,250                               
Current ownership percentage:         7.32%                                    
Change in holding since last filing:  (675,000)                                
                                                                               
Date of transaction:                  20 March 2006                            
Date company notified:                21 March 2006