Holding(s) in Company

17 February 2009

Microgen plc (the "Company")

Notifiable Interests

The Company received notice on 16 February 2009 in compliance with the
Disclosure and Transparency Rules from Invesco Limited confirming that its
holding of 4,301,167 Ordinary Shares now represents 4.95% of the issued share
capital of the Company.

The shares are registered in the name of:

                                                      No. of Ordinary Shares
                                                                            
Chase Bank                                                           310,031
                                                                            
Citibank                                                           3,991,136

If you require further information please contact:

A. Siddiqi, Company Secretary Tel: [phone]

www.microgen.com