thanks but should have said I was after a humane one.
Which my brit wonder is - when I got up the door on it was closed - couldn't quite believe there was anything in it as I could feel no struggling/wobbling when I picked it up - took it outside, opened it and the thing ran happily off. Must have been a cool philosophical mouse just biding its time.
oh by the by - it had left a bit of crap in there - those small round balls - I left that in when I rebaited with some other stuff as I had the idea that that might attract others - give other creatures the feeling that they were returning to a previously colleague-tested source of food.
Would folk recommend I leave that or take it out?
Damp mouse droppings contain leptospirosis, which can give you a very nasty illness. Make sure you don't have any cuts or grazes on you hands when handling the trap, or wear gloves. It's best to release the mouse far away from your house, otherwise it'll be back tonight.
As for bait, I've found that strawberry jam, cheese and peanut butter all work.
The jam was licked off the trip plate without springing it.
The cheese was lifted off the trip plate without springing the trap (little sods!).
The peanut butter worked very well. I think that because it's sticky, the mouse needs to make more of an effort to get the bait off the plate so is more likely to spring the trap.