So what you actually have is the new B-licence. You can drive cars, vans and (mini)buses up to 3.5 ton.
No, not quite - the UK has quite a lot of grandfather exceptions for B category holders who passed before 1997. I'm not sure how it evolved in Europe, but the UK took the approach that they couldn't remove the right to drive something - hence why when the EU categories were harmonised, existing licence holders kept the right to drive what they could drive on the old UK "car" licence. That's why it seems that WB can drive quite a lot - because he would have had always the right to drive those things.
For instance - C1 never existed as a category in the UK. So you had the car licence, which allowed you to drive rigid trucks up to 7.5 tonnes, then (as I recall) class 2 (rigid trucks up to 44 tonnes) and class 1 (articulated trucks up to 44 tonnes). When it changed to the EU system, C1 was brought in - and thus anyone who had a B licence at that point was automatically given C1.
Nah it just struck a cord yesterday when i saw a Polish drivers licences it wouldnt have surprised me if a standard Polish driver has to take a bloody test and pay money for every single thing other than just driving a car.
Count yourself lucky :P