Putting the legal side of it all to bed
We all seem to agree that it is important to ensure a driver is competent to drive the vehicle in question.
For a new driver there is a clear path as set out by the DVLA (regardless of wether it is law or not).
As the roads get busier and more complex the government has implemented driving tests and licences.
In the distant past anyone could drive anything and they did not have to sit a test or hold a licence. Over time basic testing was introduced.
Besides the actual driving of a vehicle there is alot of knowledge required. There are hundreds of road signs and road markings which have appeared. Different speed limits for different vehicles on different types of road.
As a teacher of car drivers I do not teach LGV PCV topics to learner car drivers. They learn how to drive a car, their licence as per the DVLA allows them to drive cars and small vans. If they wish to drive a larger vehicle, even if it is permitted by the exemption list, they are advised to have additional training.
Generally larger vehicles are operated by organisations such as charities who follow government recommendations in order to qualify for exemptions. A play bus for example could be driven on a B licence provided a certain amount of training is provided to each driver..
Having undergone LGV and PCV training and testing myself, I know how much more must be learned to pass the theory tests and the practical tests. The scope of the theory tests for larger vehicles covers different subjects to those found in the car theory test. It does cover legal aspects which are not relevant to motorhome drivers but most of the theory is relevant to driving a large motorhome.
It would be very alarming if a 17 year old passed their car test and took to the road in their parents 14 tonne RV that same day. That would just be lunacy.