Silbury Hill 180
Image by Zeb

Tunneling will enable the metal girders left by Atkinson to be removed.
The rust from these must be damaging fragile remains at the center.
Once the old tunnels have been cleaned out a thorough survey can be undertaken and then the tunnels
and side shafts can be properly filled in for ever.

As I said earlier they are cutting into new areas the redif will make a larger bore and remove original material, and they agree there is no guarentee that they won't induce more faults than they are trying to cure.

They did say something about the steel hoops but I can't recall offhand what it was - I will look it up later and come back and shout at you so you can hear me behind your fridge.

Is that why you haven't answered last 2 times I knocked at your door ?

VBB