I can see why they are doing it but i don't think they are going about it the right way. At the moment if you pass the test at under 21 you can have a 33bhp bike, under the new laws riders aged 17-19 wont progress from what they were entitled to ride prior to taking the test so there isn't any incentive to take the test until they reach the age of 19 and can take the test and have a bike of up to 35kw, so they will just ride around on a CBT for two years and not bother with further training up until that point. Just money making if you ask me