Car - Class B - Age 17
Quad - Class B1 - Age 17
Trailer - Class E - (general term)
LGV / PCV - Classes C,D,E
I have checked out several websites, and the age for driving LGV vehicles is 21, unless you are a member of the armed forces or similar government related body.
However, I have also heard people of 18 Learning to Drive the vehicles. If you are over 30, then there is a good chance that your licence will have more categories. (1997 - new law)
The sources where I have read or heard the information is below.
http://www.tockwithtraining.co.uk/bustraining.html
There is also a youutbe video, can't find it at the moment.
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