I know of one instance where an RAF aircraft captain was presented with a contentious passenger to be taken somewhere that the passenger would not have enjoyed. He sought advice from his deployed commander who suspended the trip whilst advice was sought from the UK.
The UK chain of command cancelled the sortie and, without hesitation, backed the actions of the aircraft captain and the detco.
The 'passenger' was moved by a different nation before being handed to another nation. The UK played no role in this affair.
Decisions are never easy, but we all have the ability to make them.