[MargaretR]

I know how upsetting it is. I remember when I first had a mouse. It was when I lived in a cottage up Belthorn. Mice come in off the moors in the autumn.
I spent 2 nights perched on a high stool in the kitchen with an iron frying pan in my hand - got 2 that way, but then got a cat.

Feeding a cat is a costly solution - better get one of those plug in pest repellers - they have 2 settings - one for crawlies and one for rodents.