Should we organise a working party to fix it then? I guess the work is either shore the existing stuff with scaff cage, or lever it all down with a bar, smash it to bits and drag it out of the cave. I am happy to help if I am free.(though levering it all down may make it an entrance rift rather than a cave passage). Other options I guess are we know there are other parts near by very close to the surface could these be open as an alternative entrance?
Some photos from April:
Smash the lot in the front to small pieces, insert large-diameter twinwall pipe into the hole at an angle, and then trim above and backfill around the pipe with all the smasheroo, and then concrete it in place? From what I can see from here, anyway.
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