I salute their intestinal fortitude. What a tremendous feat of piloting and navigation.
So many of their friends and colleagues had lost their lives in the invasion of Sicily when the glider borne troops were cast off over the sea. They were dropped many miles outside gliding range of their objectives due to a variety of factors.
As far as the civilian aviation authorities were concerned I think their involvement was suspended for the duration as presumably was the then ANO. In any case the Horsa's were service gliders and they would merely have to comply with the then equivalent of JSP318.
Cheers,
Trapper 69
PS - Even during the war the practice of courts martial never stopped so the legal profession was still able to earn their proverbial crust.