1 / 30 2 / 30 3 / 30 4 / 30 5 / 30 6 / 30 7 / 30 8 / 30 9 / 30 10 / 30 11 / 30 12 / 30 13 / 30 14 / 30 15 / 30 16 / 30 17 / 30 18 / 30 19 / 30 20 / 30 21 / 30 22 / 30 23 / 30 24 / 30 25 / 30 26 / 30 27 / 30 28 / 30 29 / 30 30 / 30 ā® āÆ Oct 1, 2024Ā Ā· the ācoal and ironā map produced by ordnance survey at the end of the second world war shows the extent of coal mining in lancashire, south yorkshire and the west.