The hedge would have to be absolutely massive to hide the henge when you are heading West. The way the road dips down before you get to it means that you would easily see it over any normal size hedge. Even if the it's a fleeting glimpse, it doesn't solve the problem as people will still rubber neck. If anything it will make it worse.

And seeing the controversy is due to the fact that it's the whole landscape that is historic, arguing that you should put a massive a-historic hedge straight across it undermines the main argument against the other proposals.

Do you really think that the planners haven't thought of a hedge and discarded the idea?