RAF Taff, you really did mean as a vehicle driver?
Very much a Cinderella trade. As in 'Truism' thread, and equally 'false'
MT is always late.
Vehicles are clapped out.
They break down.
Sorry, all vehicles are out.
Sorry, shift change.
MT drivers, and very often the majority will be contractors not Service, are really the unseen glue that keep the whole show on the road, but I suspect very few cross over from drivers, coach to drivers, aircraft.
So, follow the advice above, get more like skills experience, make yourself more employable. Show you have used your time between tests and build up team skills.
Do read the OASC sticky, all this advice is repeated there. Above all, persevere.