Kammala jumla mai zuwa: Mining ƙarshe ya tsaya a tsakiyar 1980s, bayan nacewa a cikin
1926 Babban yajin aikin Burtaniya, 1930s Depression da kuma yakin basasa na bayan yakin, amma ya zama ba zai yiwu ba bayan yajin aikin ma'adinai na Burtaniya (1984-1985), tare da Cibiyar ta zama kulob din shan giya.