This from the BBC:
Wales seeks organ opt-out powers
Wales could become the first part of the UK introduce an opt-out system of organ donation under plans by the assembly government. It would mean that Welsh residents would be presumed to be organ donors unless they have joined an opt out register or immediate relatives object.Long may it continue, however future primary law making powers are still to be crippled by Westminster...
As an aside, many countries in Europe use the presumed consent idea - Finland does not (link to English translation of Finnish law) though it has been proposed to be changed in the next year.