Well yes, but at least we have established that a touring caravan is uninsurable for permanent living so insurance of any sort for fulltiming is always going to be a bit Micky Mouse.
The answer would be any fixed bed caravan you can find for £5k in good nick. If you want British made then all makes much of a muchness. If you can find a German make like Hymer etc then probably better build quality.
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.