Thanks 2tyred. I did see an interesting idea for a homemade live-catch trap – basically a cardboard tube balanced on a table edge, above a bucket. Place bait in the end of the tube. Mouse comes down the tube, unbalances it and gets tipped into the bucket. 🙂
Based on this I laid a long tube with a bag on the end of it, along the skirting board to catch anything that came scurrying out while I was stuffing the various holes. But no one made a break for it.
I’ve now plugged what holes I can find and made sure all the tasty lentils, grains, pulses etc in the pantry are sealed away in plastic boxes.
Hopefully that’ll be enough to persuade them to hunt elsewhere without having to kill any of them.