Many of the coal mines in West Yorkshire closed during the Robens era in the 1960s .
Mining was still a significant employer in the Wakefield district at the time of the 1984 -- 85 strike .
Many of the coal mines in West Yorkshire closed during the Robens era in the 1960s , but mining was still a significant employer in the Wakefield district at the time of the 1984 -- 85 strike .