When D1 is legally required — and when it is not
Category D1 covers vehicles with nine to sixteen passenger seats. If you passed your car test before 1 January 1997 you will usually find D1 already on your licence, restricted to not-for-hire-or-reward use. Anyone who passed after that date needs to sit the D1 test to drive a minibus at all.
There are exemptions worth knowing about. Section 19 and Section 22 permits allow certain voluntary and community groups to run minibuses under specific conditions, and a limited 'not for hire or reward' concession exists for drivers over 21 in some circumstances. The rules are narrower than most club secretaries believe, and getting them wrong invalidates the insurance.
Our honest advice to schools, care providers, churches, sports clubs and community transport operators is simple: if the same person is driving regularly, get them properly qualified. A D1 licence removes every argument about permits, ages and reward, and it makes your insurance conversation considerably easier.