Core: Which licence for which trailer: B, B+code 96, BE

Which licence you need depends on two masses at once: the permitted maximum mass of the trailer, and that of the combination (car plus trailer). On a plain B you may move a trailer if it is up to 750 kg, or if it is heavier than 750 kg but the combination stays up to 3,500 kg (Book p.233). A B with code 96 (or BE) is needed if the trailer is heavier than 750 kg and the combination lies between 3,500 and 4,250 kg. BE is mandatory if the trailer is heavier than 750 kg and the combination is more than 4,250 kg — B with code 96 no longer suffices. With BE the trailer may be at most 3,500 kg, so the combination at most 7,000 kg (Book p.234). Above the BE limits (combination up to 12,000 kg, trailer heavier than 3,500 kg) you need C1E. A tandem-axle trailer may also be towed on plain B alone if the whole set is not heavier than 3,500 kg (Book p.235).