To drive anything 3500kg-7500kg and/or a minibus at over 70 you have to undertake a medical and an eye test. You need forms D2 and D4. You have to apply for these or get them from a post office because they include a window section for a photo. This explains: www.gov.uk/become-lorry-bus-driver/applying-for-a-...t / The GP medical generally costs £150 - £200. Because of delays getting appointments and possible queries by the DVLA, the whole process can take a couple of months.