Someone recently asked which cars are suitable for use on the driving test – specifically, is there an approved list of acceptable cars? The DVSA website on GOV.UK gives the best answer.
Basically, there isn’t a list of cars you can use, but there are several named ones which you can’t. Those deemed unsuitable are usually classed based on the all-round visibility, so many convertibles are automatically at a disadvantage, as are some vans or van-like cars with side panels instead of windows, and super-minis like the Toyota iQ with strange body styling.
The best option for anyone who is unsure is to contact the DVSA on the number given in that link. This goes for both test candidates and driving instructors looking for a suitable tuition vehicle.