I’ve seen squirrels up there, but never a cat on our neighbours chimney. In fact thinking about it I’m surprised I haven’t seen one before. The back of the building is where an old shed and outhouse used to be. In the way of these things someone had converted the back into a bathroom but had pretty much left the roof and chimney in situ. The only change being that they have capped the chimney with a large slab of concrete. I guess this is a pretty good vantage point for cats. There is increased activity from the birds so they are prowling around looking to chase things.
This is not one of my cats which both live entirely indoors. But our garden does attract a lot of the neighbours cats Luckily there is no sign of feathers to indicate birds have been taken, but it is a worry. I also saw another cat high up in our privet hedge this morning. It was very wobbly. Any bird would have flown before it could be attacked.
This, believe it or not is a blue tit in the garden. It was too far away to get much detail. It’s waiting to fly to one of our numerous bird feeders.