Thanks Minegeo, for concurring with me.
Having looked through many parts, of the Nenthead system underground, I can confirm what Wallace( then employed as area manager, by the L.L.C.), that fluorspar, is by and large is found in the upper strata.
Where it should be in the G.L. it is absent, yet as Wallace noted it occurs as large casts or Epimorphs, so it must have been there once upon a time.
Curiously, some of these large 'casts' sometimes contain very small fluorite crystals in them.
I think any fluorite reserves, in the West side of the N.P.O. are either in the escarpment or somewhere in the Allenheads system. Henry's vein was being evaluated by British Steel when they pulled out, but it was bedevilled by poor mining techniques, and so was not properly evaluated.