Oh no, they hadn't gone away, I have their mobile number so I sent them a text. They didn't bother rushing back, not being cat-people but he's safe back at home now, poor little mite The first thing he did when I got him in was to visit his litter-tray and then dash to his food bowl, so I think he must have been down there for quite a while before I got up this morning. He's now lounging on the bed, not a care in the world, thank goodness. I think I'm more relieved than he his