Annual Information Update

Microgen plc (the "Company")

9 May 2007

                           Annual Information Update                           

In accordance with Prospectus Rule 5.2, the Company sets out below its Annual
Information Update relating to information which has been published or made
available to the public over the 12 months from 5 May 2006 to 4 May 2007 in
compliance with the relevant law and regulations.

1. Regulatory Announcements

The following UK regulatory announcements have been issued through PRN or RNS,
both Regulatory Information Services. They can be viewed or downloaded from the
London Stock Exchange Web Site (www.londonstockexchange.com) in the Market News
section, searching under the Company's code MCGN.

Date      Regulatory Headline and Detail

24-Apr-07 AGM Statement

24-Apr-07 AGM Trading & Business Update

20-Apr-07 Holding(s) in Company

22-Mar-07 Holding(s) in Company

20-Mar-07 Holding(s) in Company

02-Mar-07 Director Shareholding

01-Mar-07 Dividend Declaration

28-Feb-07 Final Results

23-Feb-07 Holding(s) in Company

19-Jan-07 Notifiable Interest

22-Dec-06 Total Voting Rights

04-Dec-06 Directorate Change

06-Nov-06 Director/PDMR Shareholding

30-Oct-06 Interests of Directors and Connected Persons

30-Oct-06 Blocklisting - Interim Review

30-Oct-06 Interests of Directors and Connected Persons

25-Oct-06 Re: Group Update

03-Oct-06 Directorate Changes

24-Aug-06 Notifiable Interest

16-Aug-06 Notifiable Interest

26-Jul-06 Notifiable Interest

25-Jul-06 Interim Results

05-Jul-06 Notice of Interim Results

15-Jun-06 PDMR Shareholding

25-May-06 Director/PDMR Shareholding

11-May-06 Results of AGM

11-May-06 AGM Statement

05-May-06 Annual Information Update

2. Documents filed at Companies House

The Company filed the following documents at Companies House on or around the
dates indicated.

Date      Document Type

11-Mar-07 Form 288b Director Resigned

18-Feb-07 Form 288c Director's Particulars Changed

23-Jan-07 Form 288a Director Appointed

19-Dec-06 Form 88(2) Return of Allotment of Shares

19-Dec-06 Form 88(2) Return of Allotment of Shares

26-Oct-06 Form 288c Director's Particulars Changed

18-Oct-06 Form 288b Director Resigned

18-Oct-06 Form 288a Director Appointed

30-Aug-06 Form 288b Director Resigned

02-Jun-06 AGM Resolutions

02-Jun-06 Form 88(2) Return of Allotment of Shares

24-May-06 Form 363 Annual Return made up to 12 April 2006

16-May-06 Form 88(2) Return of Allotment of Shares

12-May-06 Annual Accounts - For the Year ended 31 December 2005

Copies of the documents filed at Companies House can be obtained from Companies
House website at www.companieshouse.gov.uk or Companies House, Crown Way,
Cardiff, CF14 3UZ.

3. Annual and Interim Reports
   
The Group's Annual Report for the year ended 31 December 2006 (submitted to the
UK Listing Authority's Viewing Facility on 16 March 2007) and Interim Report
for the six months to 30 June 2006 can be downloaded from the Investor
Relations section of the Microgen Web Site (www.microgen.co.uk). These
documents were published by the Company and sent to its shareholders

A copy of this Annual Information Update and all documents referred to in it
can be obtained from the Group's registered office:

Microgen plc

Fleet House

3 Fleetwood Park

Barley Way

Fleet

Hampshire

GU51 2QJ

This Annual Information Update is required by, and is being made pursuant to,
Article 10 of the Prospectus Directive as implemented in the UK by Prospectus
Rule 5.2 and not for any other purpose. Information is referred to in this
update rather than included in full. The information referred to was up to date
at the time it was published; however, some information may now be out of date.
Neither the Company, nor any other person, takes any responsibility for, or
makes any representation (express or implied) as to the accuracy or
completeness of the information.

For further information, please contact:

Gerry Liddle, Company Secretary 01252 772 313