https://www.openlearning.com/u..../haynesgreen-spfa29/
Why Buy a Category B+ Driving License? If you need to operate a vehicle or trailer that weighs more than 26,000 pounds, you'll require a class B license. It is possible to add an endorsement to the CDL class you already hold by passing a new knowledge and skills test. Passing a test for category C1+E automatically upgrades your license to include full B+E eligibility (but subject to the maximum train weight limit on your B license). This is only available to UK drivers. P