The good news is that we've discovered the cat is a mouser (one of the reasons for getting her). The bad news is finding this out obviously entailed a renewed incursion. We look forward to being woken up by her dropping half-dead mice on our faces and being shown how to kill them. Will need to look at the bait trays over the weekend to see where its been taken. Sometime over the next few weeks we're getting our floors repaired which should seal up some of the holes at least.
Revisiting the bait sites I discover the trays in the kitchen are untouched, which is good news, but the one I put under the sink cabinet in the bathroom had disappeared! I have an image of a family of mice living in a red tray marked 'Poison' somewhere down there...
Perhaps we need a couple of new games, as we've not had any in 8 months (ignoring Mystery Crescent, restarted after running out of steam. Well gosh, it's run out of steam again!)