Holding(s) in Company

28th February 2008

Microgen plc (the "Company")

Notifiable Interests

The Company received notice from UBS Global Asset Management - Traditional on
27th February 2008 in compliance with the Disclosure and Transparency Rules
that it currently holds 4,044,646 Ordinary Shares which represents 3.93% of the
issued share capital of the Company.

The shares are registered in the name of UBS Global Asset Management Life
Limited. The shares are held by proxy on behalf of a number of asset management
clients.

If you require further information please contact:

G.E. Liddle, Company Secretary

Tel: [phone]

www.microgen.com