I have a question regarding the status of aircrew who were interned in a neutral country during WW2 and subsequently released or exchanged prior to cessation of hostilities.

My brother-in-law was the pilot of a Hudson, T9439, 161 (SD) Squadron
Tempsford, that landed near Gothenburg Sweden on 19 April 1944 after a cross-country nav exercise out of Tempsford that went badly.

He and his crew were interned in Sweden and eventually returned to the U.K. in October 1944 through a diplomatic exchange with Germany, the Germans receiving a Bücker Bestmann trainer that had been stolen by two Polish chaps and flown to Sweden.

I know nothing of his air force career after his arrival back in England, which leads to my question - would aircrew members released/exchanged under these circumstances be permitted to return to operational flying, or were they "out of the war" by agreement of both Axis and Allied sides?