My worst fears etc. :(
It really would be nice to get an aerial pic of the top of the hill, without trespassing of course. Helium balloons or a kite perhaps as I know this has been done successfully before.
As the present void seems to cover a considerable portion of the top of the hill where was the trench, which discovered the sarsens at the top, dug? Has the collapsed material been searched to see if any more have fallen into the hole?
So many questions...so few answers coming from those, who are accountable to us, the general public and taxpayers.
Jim.