I have been away until last night and was unable to monitor and make timely replies to this thread.
Bolting, yes, any work needs approval. However if health and safety issues require immediate remedial action this is permissible, within reason. I have recently done some bolting as an action I considered necessary due to heath and safety grounds relative to corrosion of pre existing spit anchors and apparent explorers habits of belaying to timber.
The hydro Scheme. The trust has yet to have sight off and approve the final plans but we are led to understand that water will be gathered by a catchment which will not require the reinstatement of any dams etc. Barratts as I have said have yet to finalise and prepare their plans, the pdf is my ideas of a scheme which the trust would find acceptable.
There is something of interest there as I have attempted an interpretation of the mine compressor arrangement. It was relatively straightforward to determine the position of the twin compressors and Pelton turbine, however the remaining incline winder and mill drive arrangement is somewhat conjectural, so I left that out.
My avatar is a poor likeness.