And that is exactly the thinking that made S2 even worse (I...

And that is exactly the thinking that made S2 even worse (I personally don’t think that pumped hydro and hydrogen will ever stack up economically).

They poked a few geo holes and said “this IS the geology.”

Mat be ok if you are digging a 500mm diameter tunnel say 100m but they should have undertaken extensive geotech on the project which it is obvious they did not.