The Limpet MK3 is out now and is priced £98+VAT minus discount at Aldridge. Unfortunately they are out of stock though. Would these work OK on side doors?
Has anyone got the locks I linked to in my original post?
Just bolt a padlock hasp on the outside with a steel box welded around it so you cant get any croppers in or you could breed a big dog and leave that in the back over night
Actually you could kill 2 birds with 1 stone and tell your kids that the back of the van is their new play house/bedrooms and to blow on whistles if someone comes near