We are lately much plagued with an excess of cat. His name is Oscar, he lives in the next street and, boy, is he persistent. He is currently wandering between our first floor windows, having climbed up a wisteria to get to them.
Here is a recent photo of him. Oscar is the one on the left; our two are variously pretending he's not there and glaring at him.
But I am not sure what we can do to discourage him - his owners have been round a couple of times to take him home, we don't feed him now that we know he has a home to go to. He just wants to be around here. If he sneaks into the house, he's likely to do little more than find one of ours' sleeping places and curl up in it.