https://fkwiki.win/wiki/Post:1....4_Questions_You_Shou
Why Buy a Category B+ Driving License? You'll require a Class B license if you are required to drive a car with a trailer that weighs more than 26,000 pounds. It is possible to add an endorsement to the CDL class you already hold by taking a new understanding and skills test. A successful passing of an exam in category C1+E will allow you to upgrade your license to include the full B+E eligibility. (Subject to the maximum weight limit for your B licence.) This is only applicable to UK