It happens about three or four times a week, always 3AM, and drives me insane - I already posted about it. Very loud, a bit military drill sergeant, a bit horse racing commentator, a bit mad preacher. Didn't hear it last though which is unusual because it pretty much always wakes me up. I've called the council and they've given me the number for the community wardens who (apparently) can remove him if you call them when it's happening.