We got mice in our van yearsago and they did a lot of damage to the cushions. They climbed up a corner steady and chewed through a plastic vent.
I got under the van and put fine metal mesh over every possible place they could get in and have had no problems since.
We have just bought a brand new van and I did the same thing under the van. You would be supprised at how many places under the van that mice can get in - like around where pipes go through the floor.
Also most insurance companies do not cover fot vermine damage. Our previous insurer did but the current one does not.
thanks everyone for your help and advise. we are going to go and empty the van tomorrow bringing all sleeping bags pillows etc home. we will also be emptying all under seating and floor cupboards. we will be putting mouse traps and chocolate down for them.
where can you buy the mesh to go over the holes?.
the grass underneath and around our van needs cutting the owner is a bit slack.
you can get galvanised steel mesh from buildres merchants it can be cut with tin snips and has a fine diamond shape.The square wire mesh from pte shops is too coarse imho and mice can squeeze thro tiny gaps.It can be fixed with small staples but keep it clear of spider webs and similar ,it will block easily.We used to keep our awning in shed but found a well munched parasol.
I got the mesh from a local garden centre. The holes are only about 0.4cm square so mice should not be able to get through. It is the same mesh as used in a lot of bird feeders. It can be cut with scissors, easily moulded and I used a staple gun to fix it to the caravan floor.
I would suggest using traps instead of poison - with poison you could end up with dead mice where you can't see them and then they lead to smells. The best traps I've used are the beige plastic ones that have bait already in them - they can't resist the bait.
Using mesh is also a good idea. As a guide, the holes should be too small for a normal pencil to pass through otherwise mice will get through.