I'm still very surprised that the insurers permitted drivers that young. I had a Saab 9000 turbo (a standard road car) and I always insured it 'any driver' but the insurance stipulated that no driver under 25 was covered to drive it!
I would have thought therefore with a car that expensive and powerful, that the insurance would have stipulated 'no driver under 30'
@Paulos_the_fog I agree, I am surprised the vehicle was hired to young drivers considering how difficult and expensive it is to legally insure even a small car in London for a young/new driver without having a spybox installed. It does make you wonder if the hire company workers are paid on commission and not checking insurance implications too closely...