Holding(s) in Company

27 January 2009

Microgen plc (the "Company")

Notifiable Interests

The Company received notice on 26 January 2009 in compliance with the
Disclosure and Transparency Rules from Aberforth Partners LLP confirming that
its holding of 20,451,277 Ordinary Shares now represents 23.55% of the issued
share capital of the Company.

Aberforth Partners is interested in 19,411,077 of the voting rights of these
Ordinary Shares representing 22.36% of the issued share capital of the Company.
The shares are registered in the name of:

                                                               No. of shares
                                                                            
Aberforth Smaller Companies Trust plc                              9,993,026
                                                                            
(Nortrust Nominees Ltd A/c Aberfrth)                                        
                                                                            
Aberforth UK Small Companies Fund                                  5,459,451
                                                                            
(Nortrust Nominees Ltd A/c Aberfrth)                                        
                                                                            
The Church Commissioners for England                               2,331,600
                                                                            
(The Church Commissioners for England (Chase GIS) Nominees                  
Ltd)                                                                        
                                                                            
Aberforth Geared Capital & Income Trust plc                        1,627,000
                                                                            
(Nortrust Nominees Ltd A/c Aberfrth)                                        

If you require further information please contact:

A. Siddiqi, Company Secretary Tel: [phone]

www.microgen.com