Thanks VBB.
This isn't an HA plan, in fact I don't know if all of HA would go for it, and it isn't my original idea quite evidently, and if it's anyone's then it appears to be yours.
The one thing that seems quite clear is that in broad terms if you cut the crap, forget about the A303 controversy and look at just the right hand side of the Stonehenge WHS then everyone so far here, plus the archaeos you spoke to plus the two councillors all feel in their guts that a lot of the horrible mess at Stonehenge could be addressed separately and solved in a fairly short timescale, at an affordable and perhaps self-financing cost, quite independently of all the other stuff. Lots of minor details would need agreeing but the broad evidence is that there's something that COULD be done and everyone agrees about it. How good is that?!
How should we go about it? Form an open forum to put together a broad proposal? Invite others? Submit it to.... somewhere? HA might finance a forum if it's wanted, they have some specialist experts on board - but I stress I have no idea if they'd have a view on it. Or we could continue to develop it here. We might have missed something crucial, or not have the broad agreement we appear to have so far, I don't know.
One intriguing thing that came to me in the night - EH look after the stone circle itself but it's NT that own the vast bulk of the Stonehenge landscape...