Commuting by SS/FG

Dual carraigeways are good and safe cycling facilities, cause they have rare and well engineered intersections, plenty of space and good sight distances etc and lack on-street parking etc. Also no consideraton of plugging the traffic, cause they always have the other lane available for overtaking.

Your nation has best-in-the-world cyclist training available. If use have any considerations of handling any type of tarffic situation you should attend it.

You can't just generalise about dual carriageways, as there are very different kinds of dual carriageways, with very different characteristics. There are plenty that I would ride on at any time without any problem, and yes, vehicularly, but on others I just wouldn't, or at least not at certain times of the day, and not just the ones on which I'm not permitted to ride. There are conditions for which even cycle training doesn't prepare you. For instance, I've occasionally quite happily ridden on the A2, but I wouldn't ride the A127 westbound in the rush hour again.

You're obviously right that cycle training helps with the vast majority of scenarios.