No connection? The people who built Stonehenge are still around. All the invaders did not displace the original inhabitants who absorbed the invaders. All Britons have a right to claim Stonehenge as their own in any way they wish.
But if some Britons claim Stonehenge as exclusively their own, doesn't that refute your claim about it being the claim of "all Britons?"
My point exactly.
I hope no more graffiti artists lay claim to it. Years ago when you could walk among the stones, several had been spray painted. What would give anybody the idea they had the right to deface a world monument is beyond me.
The last time I visited, chains kept visitors at a distance from the stones. It was still jaw-dropping impressive, but sad that you couldn't stand in the middle of it.