When looking back at all the queries on Forum i have often thought lucky that has not happened to me , well apart from the sidewall of the tyre blowing that is . Someone mentioned about mice inside caravan, again i thought how do they get in as the vent holes have netting over them. Well today i have gone out to the van and happened to look at the mains cable connected to the battery, outside that is,it had been chewed in five places down to the wires by i think a squirrel.So reconnected plug after cutting chewed cable but this time threading the cable through some waste trunking i had, hope that will do.