How do aircraft land at airports without trespassing? With a 3° glide slope they are going to be below 500 ft from around 3 km out.
Commercial aircraft always fall under the remit of the CAA.
English civil law is a nightmare - expensive and precedent led so until a particular circumstance is tested (usually at huge cost to each party) the outcome is uncertain.
It also uses words like ‘resonable’ in the strict legal sense. So for example the Civil Aviation Act states that landowners can expect to have ‘reasonable’ enjoyment if their land free from nuisance.
So, as an example, a farmer puts up signs on some remote fields which are not used for livestock saying ‘no drones permitted’. You overfly one at a height of 120m and a speed of 30kmh whilst he is in his farmhouse 2km away. He takes you to court and the judge has to decide whether the flight prevented his reasonable enjoyment of his land. The answer is probably not but it would cost me £££££ to defend the position just as it would cost the farmer ££££££ to prosecute. In the end rule 1 - don’t be a knob applies. Farmer turns up and asks you to move on; pack up and go (after all he may be more friendly with the local plod than you!).
Similarly - a country house has no signs up but a drone pilot spends an hour a day hovering over the garden at a height of 50m. After a week the homeowner has had enough and threatens court action. The pilot carries on citing various CAA drone regs that show he is flying legally (ie within the bounds of criminal law) etc and suddenly finds a very expensive civil writ on their doorstep. Were they preventing ‘reasonable enjoyment’? Quite possibly but again it is going to cost money to find out.
English lawyers love arguing over a point of civil law as it usually means a healthy pay cheque
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I need to look more closely at the new police powers but they essentially extend things like public nuisance, breach of peace etc so if you’re being a knob in a public space (and by public I mean open to the public, not necessarily publically owned) they have greater powers to move you on or confiscate your equipment.