Ok, I'm a real newbie here (1st CBT in 2 weeks time) - but I have to say, I think all road users should be re-tested. Having passed my driving test twenty years ago and now reading through the highway code, I find myself going "really! - I didn't know that..." and I think I'm a good driver!
Hmm - I'm a 41 year old bloke, doing the CBT for the first time in a couple of weeks I aim to just enjoy it and not worry about it. Take it as it comes, safe in the knowledge that I can always go back the following week and try again at no cost We're new to this biking thing, so we'll make mistakes - no big deal. Just laugh them off and carry on, we'll only get better! I look forward to hearing about your CBT. Good luck & have fun. Mikey