As much as I hate what the Tories done to the country at that time (The full damage is yet to be seen), I don't think the Cornish mines (Crofty excepted) can blame them. Geeevor would have needed a huge capital injection to locate and develop new reserves, Wheal Jane was crippled by her own pumping costs. Where they stuffed crofty is they had given the mine a loan to modernise, massive amounts of infrastructure work in the mine was undertaken, one of the key elements being a pump store scheme, millions were spent constructing this, but the government witheld the last payment in 1991 which would have enabled the mine to fit it out and bring it into operation. The week following the governments decision to not pay, it was announced crofty and jane would close, obviously as things transpired crofty did not close at that time, but they did not gain the long term cost savings they would have if the various schemes were completed.