A cat has turned up, no microchip, posted on social media, not been claimed. Its been here (outside, under cover) for a week. Tibight its bloody freezing abd so I've let it in. I already have 1 cat which doesn't use a tray, but put one out (keep one on hand in case of emergency, like existing cat being ill )and it's used it twice. Good.
But I really dobt have an obvious place for it.
Terraced house, with front room, middle/dining room, kitchen at back. Upstairs bedroom, bedroom, bathroom.