Dog poo advice please!

Hello all

For the past few months, something has repeatedly been fouling my front garden. In the morning I'll occasionally find dog poo on the grass, and understandably I'm getting fed up with it.

After it happened a few times I put up a polite sign saying "Please be respectful; no dog fouling" with a dog fouling symbol. The problem stopped for a while, although I don't know whether that was because of the sign or just coincidence.

The issue is that it seems to happen overnight or very early in the morning, so I've never actually seen who or what is responsible.

I'm now considering setting up some sort of low key camera; perhaps a wildlife camera, motion camera or simple CCTV. Mainly to answer two questions:

1. Is it definitely a dog and not a cat or another animal?
2. If it is a dog, can I identify the dog and owner?

I don't want a full surveillance setup or to spend a fortune. I'm also conscious of UK privacy laws and would only want to monitor my own front garden. The purpose would simply be to identify what is happening and, if it is a local dog owner, politely ask them to stop.

Has anyone dealt with something similar? Any recommendations for a simple, inexpensive setup or general advice?

I should also mention that I have a dog myself, love dogs, and completely understand that accidents happen. I've always cleaned up after my own dog though, and I feel that's the bare minimum any owner should do. Ideally they would also take their dog somewhere more appropriate to toilet in the first place.

Thanks.