Hydrogen Group PLC
02 May 2008

Form TR-1 with annex. FSA Version 2.1 updated April 2007


For filings with the FSA include the annex
For filings with issuer exclude the annex


TR-1: Notifications of Major Interests in Shares




1. Identity of the issuer or the underlying issuer of         Hydrogen Group plc
existing shares to which voting rights are attached:


2. Reason for notification (yes/no)
                                                                

An acquisition or disposal of voting rights                   Yes


An acquisition or disposal of financial instruments 
which may result in the acquisition                           No
of shares already issued to which voting rights are attached
                                                                                        

An event changing the breakdown of voting rights              No
                                                                                       

Other (please specify):______________                         No


3. Full name of person(s) subject to notification    3i Quoted Private Equity Limited
obligation:


4. Full name of shareholder(s) (if different from    Dan Church, Chris Cole, Charles Marshall,
3):                                                  Barnaby Parker, Tim Smeaton and Ian Temple




5. Date of transaction (and date on which the        1 May 2008
threshold is crossed or reached if different):


6. Date on which issuer notified:                    1 May 2008


7. Threshold(s) that is/are crossed or reached:      Below 3%


8: Notified Details
A: Voting rights attached to shares


Class/type of     Situation previous to the Resulting situation after the triggering transaction
shares            triggering transaction
                  Number of    Number of    Number of    Number of voting rights Percentage of voting
If possible use   shares       voting       shares                               rights
ISIN code                      rights

                                                         Direct      Indirect    Direct      Indirect


  GB000B1DJTV45    19,323,348   19,323,348       0            0           0           0           0




B: Financial Instruments


Resulting situation after the triggering transaction


Type of financial    Expiration date      Exercise/ conversion No. of voting rights  Percentage of voting
instrument                                period/date          that may be acquired  rights
                                                               (if the instrument
                                                               exercised/converted)





Total (A+B)


Number of voting rights                              Percentage of voting rights


0                                                    0




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



Proxy Voting:


10. Name of proxy holder:


11. Number of voting rights proxy holder will cease
to hold:


12. Date on which proxy holder will cease to hold
voting rights:




13. Additional information:


14 Contact name:                               John Decesare / Stuart Howard


15. Contact telephone name:                    +44 (0)20 7928 3131





For notes on how to complete form TR-1 please see the FSA website.


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