(1) I strongly suspect that whoever is the next home secretary (and yes, My Grayling does look the strongest candidate right now), they'll have years of more important issues to worry about than us.
(2) My airfield has proper security. It comprises of locks on both the gate and hangar - with keys or combinations only held by club members. Customs drop in a couple of times per year, and we all have their phone number. We also sit close to a LARS provider (which is between us and the coast), so any movements will get logged on some hard drive somewhere. Any problem with that? I think that's perfectly proper.
G