Mining company Cornish Metals is looking to restart production at the mine by 2026.: Mining exploration company Cornish Metals will bring forward its plans to refurbish a mine shaft at its South Crofty tin project. The AIM-listed firm, which is working to revive production at the mine in Pool near Redruth, said on Monday (March 4) that after an assessment of the timbers in New Cooks Kitchen (NCK) shaft it had decided to start refurbishment ahead of schedule.