I can not agree with your last paragraph. Rather than 'young' leadership and new ideas we need competent leaders (of any age) who are able to make things work and get us out of the almighty mess we are in.
"I think it would be a disaster for our economy and it would lead to a decade of economic and political uncertainty at a time when the tectonic plates of global success are moving". - Andrea Leadsom talking about Brexit in April 2013.
Can't imagine BL's suggested manoeuvre would be safe on the stretch you mention. it is a long curve. All you need is someone appearing round the corner coming up the hill in his overtaking lane at 60mph or so and you have a problem.
In any case, why would anyone want to cross the second lane to overtake a vehicle which itself is overtaking?