Recommended Cash Offer

by

MICROGEN PLC

for

TRACE GROUP PLC

Notice is hereby given, in accordance with section 978(1) Companies Act 2006, that:

(a) by means of an Increased Cash Offer Document dated, published and posted to Shareholders of Trace Group plc on 20 June 2007 (“Increased Cash Offer Document”), Microgen plc (“Microgen”) is making a recommended increased cash offer at 180 pence per share (the “Increased Cash Offer”) to acquire the entire issued share capital of Trace Group plc (“Trace”); and

(b) a copy of the Increased Cash Offer Document containing the Increased Cash Offer can be inspected and collected from the offices of Arbuthnot Securities Limited, Arbuthnot House, 20 Ropemaker Street, London EC2Y 9AR, or alternatively viewed on the website of Microgen at www.microgen.co.uk

Arbuthnot Securities Limited has approved the Increased Cash Offer Document for the purposes of section 21 of the Financial Services and Markets Act 2000. Arbuthnot Securities Limited, which is authorised and regulated in the United Kingdom by the Financial Services Authority, is acting exclusively for Microgen and no-one else in connection with the Increased Cash Offer and will not be responsible to anyone other than Microgen for providing the protections afforded to clients of Arbuthnot Securities Limited, nor for providing advice in relation to the Offer, or the contents of the Increased Cash Offer Document or any matter referred to therein.

Microgen plc

20 June 2007.