Holding(s) in Company

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

Prostrakan Group plc

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

x

An acquisition or disposal of voting rights 

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

An event changing the breakdown of voting rights

Other (please specify): 

3. Full name of person(s) subject to the notification obligation:

3i Group plc (direct) 

3i Investments plc (indirect)

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

N/A

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

31 March 2009

6. Date on which issuer notified:

1 April 2009

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

5%, 4%, 3%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares 

 if possible using the ISIN CODE

Situation previous to the Triggering transaction 

Resulting situation after the triggering transaction

Number of Shares 

Number of Voting Rights 

Number of shares 

Number of voting rights 

% of voting rights

Direct

Indirect 

Direct

Indirect

GB00B09STF21

8,385,672

8,385,672

0

0

0

0%

0%

B: Financial Instruments

Resulting situation after the triggering transaction 

Type of financial instrument 

Expiration date 

Exercise/ Conversion Period/ Date  

Number of voting rights that may be acquired if the instrument is exercised/ converted. 

% of voting rights

N/A

N/A

N/A

N/A

N/A

Total (A+B)

Number of voting rights

% 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 the proxy holder:

N/A

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

N/A

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

N/A

13. Additional information:

14. Contact name:

Jackie Harper

15. Contact telephone number:

020 7975 3530

ProStrakan

+44 (0)1896 664000

Callum Spreng

Financial Dynamics

+44 (0)20 7831 3113

Ben Brewerton