Ka cika wannan jumla: Ƙarshen shekarun 1920 da kuma farkon shekarun 1930 lokaci ne mai wuya ga masu ma'adinai da masu hakar ma'adinai. A lokacin da
babban yajin aikin na 1926, jerin motocin manyan motoci sun yi tafiya zuwa Whitfield daga ko'ina cikin ƙasar don siyan ƙaramin kwal da aka adana a cikin ma'adinai. A cikin 1929 kwanaki 193 ne kawai aka yi aiki kuma a lokacin 1930s Depression 300 Whitfield masu hakar gwal sun zama marasa amfani. Gidajen kwal na Arewacin Staffordshire sun yi aiki a kan tsarin tanadi na tanadi a wannan lokacin kuma lokacin da aka samar da adadin kowane wata dole ne su dakatar da aiki.