In the UK, trespass is not a crime. It has nothing to do with the police ... unless there is criminal damage or violence associated with it. It is a Civil matter.


It would be insane to have laws which allow you to kill someone for the mere act of trespass. That would be an invitation to murder ... discreetly invite someone onto your property, then kill them.


The crime, if any is committed, is not in the fact that you have dared set foot upon another's land, but in the damage or loss which you cause. Where there is none, there is no crime.


It's also easy to construe of occasions in which someone may trespass "in good faith"... having been misinformed; or mistaken; or perhaps just under the influence of a few beers. I appreciate that this probably is not pertinent to the flying field in question.