Bushes and trees on roundabouts

Sabretooth:
after you have made a complete stop and yielded to other traffic and pedestrians. .

I would be perfectly happy with that.

I suspect that if the UK were to adopt turning on Red it would be chaotic resulting in a great many RTA’s and serious injuries even deaths.

I suspect you’re projecting the abilities of the typical American driver erroneously on to those of the British.
Not sure what any on the rest has got to do with the price of cheese.