“25 Physical or mental condition (1) This section applies if at any time in the extradition hearing it appears to the judge that the condition in subsection (2) is satisfied. (2) The condition is that the physical or mental condition of the person in respect of whom the Part 1 warrant is issued is such that it would be unjust or oppressive to extradite him. (3) The judge must— (a) Order the person's discharge, or (b) Adjourn the extradition hearing until it appears to him that the condition in subsection (2) is no longer satisfied.”
“[67] The section uses the terms “unjust or oppressive” which were used in previous statutes. In Kakis v Government of the Republic of Cyprus[1978] 1 WLR 799 , Lord Diplock, explained the terms in a well known passage in his speech at pp 782–783:“'Unjust' I regard as directed primarily to the risk of prejudice to the accused in the conduct of the trial itself, 'oppressive' as directed to hardship to the accused resulting from changes in his circumstances that have occurred during the period to be taken into consideration; but there is room for overlapping, and between them they would cover all cases where to return him would not be fair.”