Somehow it’s worked its way to the front of the house as there is now quite a large hole in the bit of damp proofing plastic by the front door which is still waiting for a skirting board. S is pretty annoyed about this. Not only does it look naff to anyone coming to the house, but also it means there's a big hole in the damp proof course. Still at least it's only between the outer hall and the living room, and not out to the outside world.
Also found a chunk bitten out of some plastic flooring in the kitchen. Clearly it prefers plastic to peanut butter. Still, mousetraps have worked in the past, so we wait some more.