If my memory is correct then Motorhomes are exempt from towbar type testing.Rainbow-Chasers said:Be warned with home - made or non proffesional towbars. All towbars MUST be tested and have a weight attached. If you have a non recognised one it will put you in bother!
Had a freind with his vehicle end up in this situation, he had one of those vans with the fibreglass body on an extended chassis, he had an engineering company make a towbar for him, and a few years later got a prohibition order from a vosa stop for his troubles, along with recovery for both van and trailer etc.
It was a harsh judgement, but it can happen!