Turning on dual carriageways

Leave your opinion about this maneuver in the comments. Is it legal? Why is it legal? It is not legal, why is it not legal? Maybe each of you can learn something from your comments and experiences.

[@dp-gc3nt]

Illegal and fail

[@drivingtestbletchleyroutes]

That's correct! Unfortunately they are not the best exemple and more of then, they can put others in bad situation.