If you think you're legal, then you'd best find a reference to the laws on the UK.gov website that make it legal for you to ride without a CBT. If you are not legal, then if you have an accident and the insurance companies look into it, they will use any excuse they can to pin the blame on you and not payout for any damages. Then you get arrested and charged with riding a bike without a licence and for riding without insurance as not having a licence invalidates your insurance policy. you then get banned from driving your car and your bike, you get a big fine and loads of points on your licence when you eventually get it back... and insurance prices for you car and bike will go up about 10000%! best find some confirmation you're legal...