There was a time that the government were considering using the Northern Ireland system, which is eminently more sensible. There are testing stations only, where you book a slot on line or phone, paying a fee. The vehicle is thoroughly tested and if there is a failure you are allowed to continue to drive, (A) if it's to get the car home, (B) if it's to get the car to a garage for the repair or (C) if it's being driven back to the test centre for a recheck. Apparently there have been problems there, mainly covid, which has led to there being a delay in booking. My friends MOT was due in September and the first date he could get was at the end of January. However sense prevailed again and providing you could show you had applied and received an MOT date, the police allowed you to continue driving in the interim.