said...
snip
We've got one of them (the second picture down). They are excellent. We
caught about twenty of them that way a couple of years ago and released
them into our barn where they kept the sheep warm.
snip
Thank you. Looks like a hunt in the attic or toolshed is in order for a
suitable mouse holder. There's got to be something amongst all the mess
here that'll come in useful for once.

Here's hubby's (un)patented mouse catcher:

find a large plastic bowl (an old salad bowl is very good), a small toy
car, a bit of wire, a bit of cheese, and (ideally) a sheet of glass.

Attach wire to bottom of car, with about 3 cm sticking out at the back.
Attach cheese to wire. Put car on sheet of glass. Prop bowl on top of
car (preferably in a fairly precarious position), with cheese on inside.

Mouse goes under bowl, munches cheese, dislodging car which shoots
outside, bowl drops, and presto ...

The setup takes a bit of practice to work out trajectories, etc. but
works superbly after that.


--
Klara, Gatwick basin