MPM.L Regulatory News (MPM)

Minster Pharmaceuticals plc

("Minster" or the "Company")

Minster Pharmaceuticals plc (AIM: MPM), the drug development company specialising in neurological and psychiatric disorders, announces that further to the announcement made on 4 January 2010 regarding Peter Blower's intention to resign as a director of Minster on 31 January 2010, the Company has received notice of Mr Blower's resignation as a director with effect from 31 January 2010.

John Russell, Minster's Chairman, said: "We are grateful to Peter for his very significant contribution to Minster as an executive director over the last five years."

Dealing Disclosure Requirements

Under the provisions of the Rule 8.3 of the City Code, if any person is, or becomes, "interested" (directly or indirectly) in one per cent. or more of any class of "relevant securities" of Minster, all "dealings" in any "relevant securities" of that company (including by means of an option in respect of, or a derivative referenced to, any such "relevant securities") must be publicly disclosed by no later than 3:30 p.m. (London Time) on the London business day following the date of the relevant transaction. This requirement will continue until the date on which the offer becomes, or is declared, unconditional as to acceptances, lapses or is otherwise withdrawn or on which the "offer period" otherwise ends. If two or more persons act together pursuant to an agreement or understanding, whether formal or informal, to acquire an "interest" in "relevant securities" of Minster, they will be deemed to be a single person for the purpose of Rule 8.3.

Under the provisions of Rule 8.1 of the City Code, all "dealings" in "relevant securities" of Minster by Proximagen or Minster, or by any of their respective "associates", must be disclosed by no later than 12:00 noon (London Time) on the London business day following the date of the relevant transaction.

A disclosure table, giving details of the companies in whose "relevant securities" "dealings" should be disclosed, and the number of such securities in issue, can be found on the Panel's website at www.thetakeoverpanel.org.uk.

"Interest in securities" arises, in summary, when a person has long economic exposure, whether conditional or absolute, to changes in the price of securities. In particular, a person will be treated as having as "interest" by virtue of the ownership or control of securities, or by virtue of any option in respect of, or derivative referenced to, securities.

Terms in quotation marks are defined in the City Code, which can also be found on the Panel's website. If you are in any doubt as to whether or not you are required to disclose a "dealing" under Rule 8, you should consult the Panel.