RNS Number:8260N
Medisys PLC
21 June 2005



For Immediate Release                                             21 June 2005


                                   Medisys PLC
                           ("Medisys" or "the Group")

            Re: Roche Legal Action - Judgement in Favour of Medisys

Medisys announces that judgement on the inequitable conduct component of the
Group's US patent dispute with Roche Diagnostics Corporation ("Roche") was
delivered late yesterday, with the judge finding in favour of Medisys and the
other defendants. The Board understands this will have the effect of striking
out Roche's Method Patent.

The Board is now consulting with its US legal counsel to consider the full
implications of this positive development and will update shareholders further
in due course.

The litigation in respect of the other patent under which Roche filed suit
against the Group continues.

                                    - Ends -

Enquiries:

Medisys PLC                                                        020 7563 5200
Michael Barry, Chief Financial Officer

Weber Shandwick Square Mile                                        020 7067 0700
Kevin Smith / John Moriarty



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