The National Trust seem to be saying that their 'rules' override the law, the guidelines issued by the CAA and are now claiming that they own all airspace above their properties - a claim which is disproved by law. They have no problem with people on the ground carrying cameras, so their data protection claims are spurious. They have no problem with people flying kites off their properties, even though they would be above the other visitors and are therefore subject to the same CAA guidelines - which are very specific: 50 metres from buildings or people outside your control or 150 metres over 'large crowds' (i.e. built up areas) which the NT properties blatantly don't fall into. I also have third-party insurance (BMFA membership) so their ludicrous claims about potential damage are covered. I would love to see a concerted 'group' effort to challenge the NT in court, to simply ask them to comply with existing CAA regulations aimed at private, non-commercial use of hobby drones. I shall be up on a cliff walk later this year, in the South West, where I shall be flying my Mavic out to sea, over waterfalls and 'tracking' myself along the pathways. I doubt there will be another human within a mile of me but, according to the NT, I'm not allowed to do this. Ludicrous policy which seems to be aimed at protecting their revenue of selling postcards, not protecting people.