Diagram attached as the setup is a bit unusual. I live in a cul de sac in a quiet town which is generally safe, but neighbour has a teenage son who seems to have some issues (occasionally 'goes missing', maybe a gang/drug connection?).
A few months ago neighbour installed a camera looking out from her front door. No problem, we have one as do most of our neighbours. Then a few weeks ago it started saying 'hi! You're being recorded!' in a loud voice every time someone walks past. Very irritating, but I can live with it. But today, she's either installed a new one or changed a setting and it now gives off a very loud alarm, every time someone walks past. I just had a delivery and the driver was very concerned - it sounds like a car or house alarm, there's no indication of why it's going off.
Because of how our houses are arranged there's no way to approach my house without setting it off.
Neighbour has serious issues and asking her nicely to turn it off is not an option. Is what she doing actually against any laws? I think the camera is fine, since it's not pointed directly at our house. But are there any rules about alarms/motion sensors? Is the only thing I can do complain about the noise to the council?