my advice is don't do it
I once got roped into recovering a 3litre granada with my VW LT35 camper yes it weighed over 3 ton and the grannie only 2 ton but add the weight of a 20ft car transporter 800kg and a tank of fuel and add so on ect.
it may be legal but it was a nightmare to do,
I had to take a 40mile detour to avoid a rather large hill
I would not do it and I'd advise against any one doing it
I once got roped into recovering a 3litre granada with my VW LT35 camper yes it weighed over 3 ton and the grannie only 2 ton but add the weight of a 20ft car transporter 800kg and a tank of fuel and add so on ect.
it may be legal but it was a nightmare to do,
I had to take a 40mile detour to avoid a rather large hill
I would not do it and I'd advise against any one doing it