How to stop my neighbours trespassing?
We share a common alleyway which leads to our backyards and theirs. They filled up their side of the alleyway with furniture and ended up using our side to get out. The most annoying thing is that they cut through our driveway and activate the motion sensor camera (and our dog who is an enthusiastic barker). Often, they would have people coming over for BBQ parties and use our driveway as a “greet and meet” since their driveway is full of cars. They have about 8-9 cars plus a massive van so their driveway is never empty.
It got so annoying, I just turned off the camera notifications. My partner ended up putting the car outside to block them but they still managed to find ways around the car and walk on our driveway.
Would it be possible to put up a fence to separate their side and ours? Do we need to get a permit to do so?
Edit: Photo removed as per others’ advice