Can you pre-book a test drive when the show is announced, by contacting Motability and reserving a time slot. .
That is something I’ve always wondered about John and I know they publish what cars can be driven at an event and even what adaptions the cars have fitted I don’t think there’s an option for pre-booking but not 100% sure and no one coming back to your post leads to the conclusion that you can’t pre-booked.
It’s a shame though because its the only time I can test drive a car but on the other hand its also a rare event for the model, gearbox, engine size, type and so on all come together at the same time.