I can't see a special license or endorsement being implemented. But that said, as you note poor but proud, the many responses are already surfacing.
But really, the reality is vans are getting heavier, tow vehicles bigger, hence weights are increasing.
If you want to drive any truck that weighs more than 4500kg empty you need to have gained an MR license, and, you are required to carry a Log Book with restricted driving hours.
Yet, any one can go buy a caravan that weighs well above 3000kg, with a tow vehicle weighing anywhere from 2200kg upward, then becoming an articulated combination, and is not required to undergo any training....set off in to the sunset driving for as many hours as you wish.
Add to that there is no requirement to have the set up inspected...ever. No brake checks, no light checks, no nothing...just hit the road.
There are some that would welcome some additional driver training, but there are many who see any requirement as an impost on the personal lives.
The below was a classic example of stupidity...this bloke definitely needed a reality check! ...driving passed signs that read "Not Suitable for Trucks, Buses, caravans, Trailers. I have driven this road many times, no way would be dumb enough to tow my caravan up there!
But as you note poor but proud...
"but all the tickets and fees in the world cant cure stupid"