If he is a lawyer, then Munnyspinner will have also noted my comment about the offence being relevant to the country the aircraft landed in. UK law applies in the air on G registered aircraft, but not when the doors are open, on the ground in another country. Then the local laws apply and these are the laws you would be charged with. The points made by Munnyspinner are valid in the UK but are subject to the law of other lands when elsewhere. If you are happy to argue legal niceties when the loss of a hand may be at stake keep moving seat.