This is only slightly OT but I'm trying to fix the problem my self.
Living partly in the country we have a number of field mice visitors.
Catching them is easy a piece of chocolate on a mouse trap and there almost always caught by the next day.
Stopping the mice getting in the issue. I thought I have stopped then this year by putting the ends of partly poppers with a (slightly enlarged hole) into all the air bricks. The party popper are round so there are 4 corners for air to get round and with the slightly larger hole in the centre of the party popper I don't think I have any ventilation problems.
Yesterday I still found on of them in the house, the traps will be out tonight to get rid of it, the question is how do they get in? The air vents appeared to be the only open points of entry to the house.
Any Ideas ??
Thanks