Offer Update

microgen

Information Management Solutions

www.microgen.co.uk

5 May 2005

For release at 7:00am

                         Update on Offer for AttentiV                          

Microgen plc ('Microgen') notes the announcement made yesterday by TietoEnator
regarding its increased offer for AttentiV Systems Group plc ('AttentiV'),
worth 85.5 pence in cash per AttentiV Share.

As a result of this increased cash offer the Board of Microgen has reviewed its
options. The Board has concluded that it is not in Microgen shareholders'
interest to increase the value of its proposed offer for AttentiV.

Enquiries:                                                                     
                                                                               
Mike Phillips, Group Finance Director   01753 847122                           
                                                                               
Nick Adams, UBS Investment Bank         020 7567 8000                          
                                                                               
Giles Sanderson, Financial Dynamics     020 7831 3113