I did say it could be difficult to enforce, but the powers that be manage it with motorcycles. Plus the fact it's relatively easy for the Cops to judge the age of a driver they see, but almost impossible to do it for someone wearing a full face helmet. Plus the fact that 7 miles would be ridiculous, 30 being far more practical. But, if you're drawing the conclusion that young/new drivers can't drive outside the given radius at all, all they need do is take the further training. A young lad I taught to drive several years ago had a number of crashes in his car, so much so that seeing he was on a limited income being an apprentice, his father refused to help him pay for a new clutch which was slipping badly and therefore acted as a speed limiter. It still didn't stop him stuffing his Astra into the front of a 4WD coming the other way on a bend. If only he'd taken Pass+ he might have learnt how to take a bend properly.
What would this further training be?
Pass Plus is utterly useless, it doesn't teach you how to take a bend either.
Dom