I think we did a day's course with a Lantra provider in Dorset but took the assessment online at the venue under supervision so we couldn't cheat.It will be online at an authorised centre, I think. Rather like the theory test for a driving licence. Lantra would have details, I would think. Back when we did ours, we studied the course online, and then took the test at an agricultural college. Saved money doing it that way, because we didn't have time to take a whole day off farm.