the way UK law works, you have to have camera visible and not pointing at other peoples' premises. Eg windows.

Just thought but how legal is it to have a fake camera visible and a covert camera covering a similar vista?
It would be one up on the criminal who might try to inhibit a camera, though if they think it is worth their while they are not that bothered with being filmed.

How robust is WiFi? I have seen a case on TV where cars were locked wirelessly but the crims were firing high power to block the transmission. Owners assumed the lock had worked and in the wee small hours the car is open to take whatever.