To be honest Pete, it is a serious worry, a person can drive a 4 wd and a caravan well over 3500kg, but a m/h no larger than a 3500kg m/h just uprated and it is a BIG no no.
That post is confusing Graham, forget your HGV entitlement for a second
At 70 if you renew your licence with Grandfather rights you can drive up to 7500 kgs and a 750 kg trailer....so this would cover you for a 4x4 plus caravan or MH not exceeding 7500 kgs
If you don't renew your grandfather rights the licence issued is in effect as if you had passed a driving test 1997 onwards
You are then restricted to 3500 kgs so a motorhome plated at 4100 kgs is illegal 3500kgs combined is also the limit re what I highlighted
So if you are pulling a caravan with a 4x4 where the combined GTW exceeds 3500 KGS you are legal but whilst the gtw may exceed 3500 kgs ...the true weight roadside must not exceed 3500 kgs .
My understanding is post 2013 the gtw must not exceed 3500 kgs of the combination
I hope that makes sense and is my understanding although elsewhere I have read people adamant that post 97 the gtw must not exceed 3500 kgs.
I suspect the inequality boils down to a caravan is classed as a trailer hence the combined calculation the drawing vehicle below 3500 kgs eg a 4x4 typically weighs 2000 kgs
don't make it easy do they ?
Channa