There's a very skinny cat, very aggressive and very yowly cat that keeps coming into mine and NDN's garden to yowl and growl loudly and attack our cats - more the NDN cat than mine, as Casper is a huge ginger who can take care of himself, but he still comes in to yowl at him.
I'm not sure if he's a stray - he's very thin, and I think unneutered (although I've never got too close) - but there is a lady on our street who owns (or at least feeds) several, so he could be one of hers.
Apart from the aggression towards our cats, the noise he makes is loud enough to wake up DS, who's 4, so he's not getting enough sleep (this happens several times day and night). He's tried to get into our house a few times but Casper has chased him.
A quick Google of the local RSPCA and CPL suggests they won't do anything as he may have an owner and looks healthy enough, but is there anything I can do? I chase him every time but he keeps coming back!