Holding(s) in Company

TR-1 (i) NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which
voting rights are attached (ii):

ITM Power Plc

2. Reason for the notification                                  State          
                                                                Yes/No         
                                                                               
An acquisition or disposal of voting rights                       No           
                                                                               
An acquisition or disposal of financial instruments               No           
which may result in the acquisition of shares already 
issued to which voting rights are attached                                                            
                                                                               
An event changing the breakdown of voting rights                  No           
                                                                               
Other (please specify): Yes                            Revised due to DTR rules
                                                           - see section 13    

3. Full name of person(s) subject to the notification         FMR Corp         
obligation (iii):                                                              
                                                                               
4. Full name of shareholder(s) (if different from 3.)      See Additional      
(iv):                                                  Information in C below  
                                                                               
5. Date of the transaction (and date on which the     Revised due to DTR rules 
threshold is crossed or reached if different) (v):                                                  
                                                                               
6. Date on which issuer notified:                           14 March 2007      
                                                                               
7. Threshold(s) that is/are crossed or reached:                  N/A           
                                                                               
8. Notified details:                                                           

A: Voting rights attached to shares

 Class/type of  Situation previous   Resulting situation after the triggering  
    shares              to                       transaction (vii)             
  if possible     the Triggering                                               
using the ISIN   transaction (vi)                                              
     CODE                                                                      
                                                                               
                 Number    Number    Number  Number of voting    % of voting   
                   of        of        of       rights (ix)         rights     
                 Shares    Voting    shares                                    
                           Rights                                              
                           (viii)                                              
                                                                               
                                     Direct  Direct  Indirect  Direct  Indirect
                                               (x)     (xi)                    
                                                                               
 GB00B0130H42   2,122,214 2,122,214                  2,122,214          2.09%  
                                                                               

B: Financial Instruments

Resulting situation after the triggering transaction (xii)

   Type of     Expiration       Exercise/        Number of voting       % of   
  financial    date (xiii)      Conversion      rights that may be     voting  
 instrument                 Period/ Date (xiv)    acquired if the      rights  
                                                    instrument                 
                                                   is exercised/               
                                                     converted                 
                                                                               

Total (A+B)                                                                    
                                                                               
Number of voting rights                 % of voting rights                     
                                                                               
2,122,214                               2.09%                                  

9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable (xv):

See Additional Information in C below                                          

Proxy Voting:


10. Name of the proxy holder:                                 FMR Corp         
                                                                               
11. Number of voting rights proxy holder will cease to hold:  N/A              
                                                                               
12. Date on which proxy holder will cease to hold voting      N/A              
rights:                                                                        

13. Additional information:                    As discussed with the FSA, prior to the
                                               implementation of the EU Transparency  
                                               Directive, we aggregated the interests 
                                               in shares of FMR Corp (FMR) and        
                                               Fidelity International Limited (FIL)   
                                               together for the purposes of           
                                               shareholder reporting. According to the
                                               new DTR rules we are now reporting the 
                                               indirect holdings of FMR and FIL       
                                               separately. A separate notification is 
                                               being submitted for FIL. Please note   
                                               these holdings are correct as of close 
                                               of business 12 March 2007.             
                                                                                      
14. Contact name:                              Laura Cotterell                        
                                                                                      
15. Contact telephone number:                  [e-mail]

Annex Notification Of Major Interests In Shares (xvi)


A: Identity of the person or legal entity subject to the                       
notification obligation                                                        
                                                                               
Full name (including legal form for legal entities)                            
                                                                               
Contact address (registered office for legal entities)                         
                                                                               
Phone number                                                                   
                                                                               
Other useful information (at least legal representative for                    
legal persons)                                                                 
                                                                               
B: Identity of the notifier, if applicable (xvii)                              
                                                                               
Full name                                                                      
                                                                               
Contact address                                                                
                                                                               
Phone number                                                                   
                                                                               
Other useful information (e.g. functional relationship with                    
the person                                                                     
or legal entity subject to the notification obligation)                        

C: Additional information

SHARES HELD      NOMINEE           MANAGEMENT COMPANY                                         
                                                                               
2,122,214        MELLON BANK N.A.  FMRCO                                               
                                                                               
FMR Corp is the 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.           

Notes

i. This form is to be sent to the issuer or underlying issuer and to be filed
with the competent authority.

ii. Either the full name of the legal entity or another method for identifying
the issuer or underlying issuer, provided it is reliable and accurate.

iii. This should be the full name of (a) the shareholder; (b) the person
acquiring, disposing of or exercising voting rights in the cases provided for
in DTR5.2.1 (b) to (h); (c) all the parties to the agreement referred to in
DTR5.2.1 (a), or (d) the direct or indirect holder of financial instruments
entitled to acquire shares already issued to which voting rights are attached,
as appropriate.

In relation to the transactions referred to in points DTR5.2.1 (b) to (h), the
following list is provided as indication of the persons who should be
mentioned:

- in the circumstances foreseen in DTR5.2.1 (b), the person that acquires the
voting rights and is entitled to exercise them under the agreement and the
natural person or legal entity who is transferring temporarily for
consideration the voting rights;

- in the circumstances foreseen in DTR 5.2.1 (c), the person holding the
collateral, provided the person or entity controls the voting rights and
declares its intention of exercising them, and person lodging the collateral
under these conditions;

- in the circumstances foreseen in DTR5.2.1(d), the person who has a life
interest in shares if that person is entitled to exercise the voting rights
attached to the shares and the person who is disposing of the voting rights
when the life interest is created;

- in the circumstances foreseen in DTR5.2.1 (e), the parent undertaking and,
provided it has a notification duty at an individual level under DTR 5.1, under
DTR5.2.1 (a) to (d) or under a combination of any of those situations, the
controlled undertaking;

- in the circumstances foreseen in DTR5.2.1 (f), the deposit taker of the
shares, if he can exercise the voting rights attached to the shares deposited
with him at his discretion, and the depositor of the shares allowing the
deposit taker to exercise the voting rights at his discretion;

- in the circumstances foreseen in DTR5.2.1 (g), the person that controls the
voting rights;

- in the circumstances foreseen in DTR5.2.1 (h), the proxy holder, if he can
exercise the voting rights at his discretion, and the shareholder who has given
his proxy to the proxy holder allowing the latter to exercise the voting rights
at his discretion.

iv. Applicable in the cases provided for in DTR 5.2.1 (b) to (h). This should
be the full name of the shareholder or holder of financial instruments who is
the counterparty to the natural person or legal entity referred to in DTR5.2.

v. The date of the transaction should normally be, in the case of an on
exchange transaction, the date on which the matching of orders occurs; in the
case of an off exchange transaction, date of the entering into an agreement.

The date on which threshold is crossed should normally be the date on which the
acquisition, disposal or possibility to exercise voting rights takes effect
(see DTR 5.1.1R (3)). For passive crossings, the date when the corporate event
took effect.

These dates will usually be the same unless the transaction is subject to a
condition beyond the control of the parties.

vi. Please refer to the situation disclosed in the previous notification, In
case the situation previous to the triggering transaction was below 3%, please
state `below 3%'.

vii. If the holding has fallen below the minimum threshold , the notifying
party should not be obliged to disclose the extent of the holding, only that
the new holding is less than 3%.

For the case provided for in DTR5.2.1(a), there should be no disclosure of
individual holdings per party to the agreement unless a party individually
crosses or reaches an Article 9 threshold. This applies upon entering into,
introducing changes to or terminating an agreement.

viii. Direct and indirect

ix In case of combined holdings of shares with voting rights attached `direct
holding' and voting rights `indirect holdings', please split the voting rights
number and percentage into the direct and indirect columns-if there is no
combined holdings, please leave the relevant box blank.

x Voting rights attached to shares in respect of which the notifying party is a
direct shareholder (DTR 5.1)

xi. Voting rights held by the notifying party as an indirect shareholder (DTR
5.2.1)

xii If the holding has fallen below the minimum threshold, the notifying party
should not be obliged to disclose the extent of the holding, only that the new
holding is below 3%.

xiii date of maturity / expiration of the finical instrument i.e. the date when
the right to acquire shares ends.

xiv If the financial instrument has such a period-please specify the period-
for example once every three months starting from the [date]

xv. The notification should include the name(s) of the controlled undertakings
through which the voting rights are held. The notification should also include
the amount of voting rights and the percentage held by each controlled
undertaking, insofar as individually the controlled undertaking holds 3% or
more, and insofar as the notification by the parent undertaking is intended to
cover the notification obligations of the controlled undertaking.

xvi. This annex is only to be filed with the competent authority.

xvii. Whenever another person makes the notification on behalf of the
shareholder or the natural person/legal entity referred to in DTR5.2 and
DTR5.3.