Korcala v Polish Judicial Authority [2017] EWHC 167 (Admin)
"This extradition appeal involves essentially two questions: (i) If a person has been found incapable of committing a criminal offence in the country in which he was tried because of mental illness, but has been ordered to be detained indefinitely in a mental hospital, has he been 'convicted' for the purposes of Part 1 of the Extradition Act 2003 ('EA')? (ii) If that person then flees the mental hospital and is wanted for a prosecution for that offence, would there be an equivalent offence if the events had taken place in England so that the double criminality requirement is satisfied and the offence qualifies as an 'extradition offence'?"
ICLR
The ICLR have kindly agreed for their WLR (D) case report to be reproduced below.