I’ve put together a bucket trap. Basically, I used packing tape to strap a piece of dowel to a 75L bin, and threaded an empty can with both ends removed onto it. I put peanut butter on the tin can, and a piece of wood leaning against the bin acts as a ramp. Pictures for the curious.
Then as I stood there agonising over whether or not to half fill the bin with water (drowning just doesn’t seem humane), I got called into the house to do Mum things and by the time I got back out there… it was dark. I’m not lugging that thing around the other side of the house to the tap in the dark to fill it. So, the trap is out there and set, but if it works I’m going to have a bin full of live rats to somehow dispose of.