Annual Information Update

6 May 2008

                         Microgen plc (the "Company")                          

                           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 2007 to 6 May 2008 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

02-May-08   Director Shareholding

28-Apr-08   Statement re Scisys plc

22-Apr-08   AGM Statement

            Interim Management Statement

16-Apr-08   Offer Update

11-Apr-08   Statement re Scisys

04-Mar-08   Holding(s) in Company

29-Feb-08   Director/PDMR Shareholding

28-Feb-08   Holding(s) in Company

25-Feb-08   Total Voting Rights

            Holding(s) in Company

21-Feb-08   Final Results

03-Jan-08   Blocklisting - Interim Review

07-Dec-07   Director Shareholding

06-Dec-07   Total Voting Rights

05-Dec-07   Director/PDMR Shareholding
            Director Shareholding

04-Dec-07   Trading & Business Update

22-Oct-07   Holding(s) in Company

14-Sept-07  Holding(s) in Company

06-Sept-07  Appt.of Advisor & Brokers

05-Sept-07  Total Voting Rights

06-Aug-07   Director/PDMR Shareholding

02-Aug-07   Offer Update

31-Jul-07   Offer Lapsed

30-Jul-07   Offer Update

23-Jul-07   Offer Update

19-Jul-07   Interim Results

17-Jul-07   Notice of Results

16-Jul-07   Offer Update

09-Jul-07   Trading Statement

06-Jul-07   Offer Update

02-Jul-07   Holding(s) in Company

25-Jun-07   Result of EGM

20-Jun-07   Increased Offer Doc Posted

15-Jun-07   Recommended Increased Offer

08-Jun-07   Posting of Class 1 Circular

01-Jun-07   Offer Document Posted

25-May-07   Recommended Offer for Trace

22-May-07   Update re Trace Group plc

15-May-07   Blocklisting - Interim Review

14-May-07   Disposal Completion

11-May-07   Stmt re Trace Group plc

08-May-07   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

25-Apr-08   MEM/ARTS Memorandum of Association/Articles of Association

25-Apr-08   RES01 Disapp pre-empt rights/Alter Articles

25-Feb-08   88 (2) Return of Allotment of Shares

11-Dec-07   88 (2) Return of Allotment of Shares

11-Sep-07   88 (2) Return of Allotment of Shares

11-Sep-07   88 (2) Return of Allotment of Shares

21-Aug-07   288c Director's Particulars Changed

04-July-07  Res 13 Share option Scheme

18-May-07   Res 11 Auth Allot of Security/Disapp Pre-empt rights

16-May-07   Annual Accounts For the year ended 31 December 2006

11-May-07   363s Annual Return made up to 12 April 2007

11-Mar-07   288b Director Resigned

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 2007 (submitted to the
UK Listing Authority's Viewing Facility on 7 March 2008) and Interim Report for
the six months to 30 June 2007 can be downloaded from the Investor Relations
section of the Microgen Web Site (www.microgen.com). 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:
Philip Wood, Group Finance Director 01252 772 312