I'll try and keep it brief...
We live in a ground floor flat in London with our two dcs. The upstairs neighbours moved in three or so years ago. Relations were always fairly cordial (although we were aware that he spends pretty much all of his days indoors smoking skunk and playing pretty loud music). Occasionally there would be some outburst (him yelling lengthy abuse out of the window, that type of thing), the police have been round a couple of times, as have other neighbours looking for 'that psycho'.
Recently the woman neighbour sent a request that we try and limit the kids' noise on weekend mornings, which we've tried to do as much as possible. However, since then I've had angry encounters with him, he claims that he's been sent bailiff letters mistakenly to our address not his and that he hasn't received them and that now 'they're on his back' (implying, I think, that I've thrown them away or something (which I haven't obviously)). Since then, he's upped his game, music louder than ever, lots of door banging, really rude if we encounter him etc.
I want to say something about the noise, which is getting out of hand, especially in the light of their request about our kids. I also want to set the record straight about these sodding letters, although I'm not sure that's wise, he is extremely volatile.
The nub of it is that we want to move, we're having another baby and this place is too small. IIRC there is some rule about disclosing disagreements with neighbours? Does anyone know what a 'disagreement' actually is in this context? And what would you do in my shoes?
Sorry for ramble!