Looking at the pointed roof it could possibly be a Thomson caravan except that there is only a single dividing strip between the top and bottom whereas looking at Google images it looks like Thomson had twin strips along each side.
Sorry the door is on the nearside. the image must have got reversed during the scan save process. The tow car is indeed a mk1 cortina, as it turned out not the best tow ca in the world.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.