And it turns out to be a near neighbour 
I thought last time it might have been a mistake (following his dog and getting it back, for example. But no. He walked onto the garden, stood by a window, letting his dog wee!!
It’s a small front garden with no fence, but very little space to put a fence as the path is narrow. I am so angry and not sure how to tackle it. I don’t want to annoy neighbours, but walking over the garden and letting it wee is so disrespectful! 