Graham
I can still remember being 21. It involved wheelspin starts, snatched gearchanges, no regard for speed limits. cornering on the edge. I once had all four wheels well off the ground at 60mph, when an unexpected hump backed bridge appeared from nowhere.....
I survived because I didn't have more than 70bhp. In a Roadster I would probably not have survived long.
21 year olds have no fear. That's my experience. I wouldn't lend my Roadster to anybody - even a 21 year old leggy blonde on a dead cert payback.........