Found it,
2.2.2 International Status. Military aircraft are "state aircraft" within the
meaning of the Convention on International Civil Aviation of 1944 (the
"Chicago Convention"), and, like warships, enjoy sovereign immunity from
foreign search and inspection. Subject to the right of transit passage, archipelagic
sea lanes passage, and entry in distress (see paragraph 2.5.1), state aircraft may not
enter national airspace (see paragraph 1.8i or land in the sovereign territory of
another nation without its authorization. 5 Foreign officials may not board the aircraft without the consent of the aircraft commander. Should the aircraft
commander fail to certify compliance with local customs, immigration or
quarantine requirements, the aircraft may be directed to leave the territory and
national airspace of that nation immediately.16
https://www.google.co.uk/url?sa=t&rc...46496531,d.ZGg
(dated 8 Mar 1983) But I wouldn't have thought it had changed, so surely the Gibbo plods had no jurisdiction. By the fact they possibly removed him under duress, IE they prevented the aircraft departing, and possibly hence broke the law in doing so, would that not effect any case they may have against him?