Notifiable Interest

microgen

Information Management Solutions

www.microgen.co.uk

26th July 2006

Microgen plc (the "Company")

Notifiable Interests

The Company received notice on 26th July 2006 under Sections 198-202 of the
Companies Act 1985 that Aberforth Partners LLP is interested in 15,538,151
Ordinary Shares representing 15.14% of the issued share capital of the Company,
which is currently 102,641,214 Ordinary Shares.

The shares are registered in the name of:

                                                                  No. of shares
                                                                               
Nortrust Nominees Limited A/C ABERFRTH                               12,658,551
                                                                               
Bank of Ireland Nominees Limited                                        704,400
                                                                               
The Church Commissioners for England (Chase                           1,016,300
GIS) Nominees Limited                                                          
                                                                               
State Street Nominees Limited A/C JD59                                1,158,900
                                                                               
                                                                     15,538,151

If you require further information please contact:

G.E. Liddle, Company Secretary

Tel: [phone]