Newly released papers from Margaret Thatcher's time at Number 10 have shown she may have planned to close over 70 pits.
The secret "hit-list" means that the government may have been looking at a further 50 closures than the 20 that were talked about by the government and National Coal Board.
The document reveals they wanted to close the mines over a three year period.
Arthur Scargill, then leader of the Yorkshire National Union of Miners, had always claimed the government were planning to close more mines than were being discussed publicly.
More top news
A police officer has told the Hillsborough inquests he didn't feel he had received any specific direction on the day of the disaster
A sergeant in charge of officers policing fans at the turnstiles was taken "out of action" for an hour before the kick-off to write reports.
NHS England has set out a new set of standards for congenital heart disease services.