Notifiable Interests

microgen Information Management Solutions www.microgen.co.uk 19th September 2005 Microgen plc (the 'Company') Notifiable Interests The Company received notice on 16th September 2005 under Sections 198-202 of the Companies Act 1985 that Aberforth Partners is interested in 14,238,151 Ordinary Shares representing 13.91% of the issued share capital of the Company, which is currently 102,327,567 Ordinary Shares. The shares are registered in the name of: No. of shares Nortrust Nominees Limited A/C ABERFRTH 11,474,651 Bank of Ireland Nominees Limited 719,900 The Church, Commissioners for England (Chase 955,200 GIS) Nominees Limited State Street Nominees Limited A/C JD59 1,088,400 14,238,151 If you require further information please contact: G.E. Liddle, Company Secretary Tel: 020 7239 8479 ND
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