My middle child (16) frequently rides with me and we are now very close in terms of performance. I am faster downhill (weight and experience) and he is faster on ascents (weight and vigour). As a result we pass one another during 'competitive' training rides. When I was a motorcycle courier, the great fear was to be stopped for 'racing on the highway'. So... Despite being canny about our passing and not getting all Abdudzaperov with our elbows, are we in danger of eliciting a response from Plod with our exuberant on-road behaviour? Can two people have a good old ding-dong race on bicycles on an NSL single-carriageway A-Road? And if it's allowed, is it prudent, sensible and proper? I'm genuinely interested in the responses. I think it's OK, but I don't ant to be guilty of teaching my son behaviours that are bad, naughty and wrong. Thoughts, please.