Holding(s) in Company

ReNeuron Group plc
12 April 2007




TR-1:  NOTIFICATION OF MAJOR INTERESTS IN SHARES




1. Identity of the issuer or the underlying issuer         RENEURON GROUP PLC
of existing shares to which voting rights are
attached

2. Reason for the notification (please tick the appropriate box or boxes)


An acquisition or disposal of voting rights                                 X

                                                                                              
An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issued to which rioting rights are attached


An event changing the breakdown of voting rights


3. Full name of person(s) subject to the                        Michael David McCarthy
notification obligation

4. Full name of shareholder(s) (if different from 3.)

5. Date of the transaction and date on which the                2 April 2007
threshold is crossed or reached

6. Date on which issuer notified                                2 April 2007

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

8. Notified details:




A: Voting rights attached to shares
Class/type       Situation                Resulting situation after the triggering transaction vi
of shares        previous to the
                 Triggering
if possible      transaction
using the ISIN   Number of   Number       Number of    Number of voting rights % of voting rights
CODE             Shares                   shares       ix
                             of Voting
                             Rights       Direct       Direct      Indirect    Direct      Indirect

Ordinary Shares   3,400,000   3,400,000    4,488,000    4,488,000                3.259%




B: Financial Instruments
Resulting situation after the triggering transaction
Type of financial    Expiration    Exercise/Conversion       Number of voting rights    % of voting
                     date          Period/Date               that may be acquired if    rights
instrument                                                   the instrument is
                     -                                       exercised/converted

                           -                   -                         -                     -




Total (A+B)
Number of voting rights                            % of voting rights

     4,488,000                                             3.259%


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 the 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:                                    Michael Hunt, CEO
15.  Contact telephone number:                        01483 302560







Signed: ...................................................Michael Hunt, CEO





ANNEX TO NOTIFICATION OF MAJOR INTERESTS IN SHARES


A:       Identity of the person or legal entity subject to the notification obligation
Full name (including legal form for legal entities)      Michael David McCarthy
Contact address (registered office for legal             23 Cyncoed Place

entities)                                                Cyncoed

                                                         Cardiff

                                                         CF23 6SG
Phone number
Other useful information (at least legal                  -

representative for legal persons)




B:       Identity of the notifies; if applicable


Full name                                                Brinley Knoyle
Contact address                                          2nd Floor,

                                                         St Andrew's House

                                                         24 St Andrew's Crescent,

                                                         Cardiff

                                                         CF10 3DD
Phone number                                             02920 720 701
Other useful information (e.g. functional                Stockbroker to Mr McCarthy

relationship with the person or legal entity subject

to the notification obligation)




C:       Additional information







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