Re: Detaining pax on board - Legalities?
Trip, IMO 'Yes' Any citizen has the right to detain another if he believes a crime has been/is being committed, until the Police arrive. You can detain him in a room with door closed - but not locked (unlawful imprisonment) provided you contact the Police immediately with details.
Aircraft etc may have diplomatic questions but IMO a UK reg aircraft is UK territory subject to UK Law, certainly in the UK. Unless the lawyers know diff!