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Company Name |
Location |
Area |
Year |
Class |
Box No |
Company No |
| F Coals Ltd | 1937 | BT31 | 41823 | 327196 | ||
| Fair Oak Colliery Co. Ltd | 1871 | BT31 | 1642 | 5667 | ||
| Fairview Coal Mining Co. Ltd | 1898 | BT31 | 8232 | 59709 | ||
| Fallings Heath Colliery & Firebrick Co. Ltd | Dudley | Worcestershire | 1916 | BT31 | 23313 | 144182 |
| Fallowfield Coal Co. Ltd | Fallowfield | Northumberland | 1894 | BT31 | 5753 | 40288 |
| Falmouth Coal Supply Ltd | 1893 | BT31 | 5584 | 38876 | ||
| Falmouth Gas Coal & Coke Co. Ltd | 1866 | BT31 | 1244 | 2952 | ||
| Falstone Coal Co. Ltd | Falstone | Northumberland | 1908 | BT31 | 18397 | 97421 |
| Farm House Collieries Ltd | Barnsley | Yorkshire | 1921 | BT31 | 26782 | 176868 |
| Farmers Coal & Manure Co. Ltd | 1873 | BT31 | 1896 | 7641 | ||
| Farmers Lime Coal & General Supply Co. Ltd | 1865 | BT31 | 1137 | 2332C | ||
| Farms Coal Co. Ltd | 1893-1918 | BT2 | 2473 | |||
| Faroe Islands Coal Co. Ltd | 1900 | BT31 | 9075 | 67168 | ||
| Fassifern Coal Co. Ltd | 1895 | BT31 | 31374 | 43059 | ||
| Federated Coal & Shipping Co. Ltd | 1911 | BT31 | 35010 | 115029 | ||
| Fell Lane Colliery Co. Ltd | Barnsley | Yorkshire | 1936 | BT31 | 37779 | 313198 |
| Felling Coal Iron & Chemical Co. Ltd | 1871 | BT31 | 1641 | 5655 | ||
| Feltham & District Coal Supply Ltd | 1911 | BT31 | 13556 | 114856 | ||
| Fence Colliery Co. Ltd | 1863 | BT31 | 764 | 359C | ||
| Fenton Collieries Ltd | Stoke-on-Trent | Staffordshire | 1910 | BT31 | 36885 | 110557 |
| Fenton Park Iron & Coal Co. Ltd | Stoke-on-Trent | Staffordshire | 1867 | BT31 | 1329 | 3486 |
| Fenton Pottery Coal & Ironstone Mining Co | BT41 | 237 | 1352 | |||
| Fernhill Collieries Ltd | Treherbert | Glamorganshire | 1910 | BT31 | 38771-3877 | 110408 |
| Ferries Coal & Haulage Co. Ltd | 1923 | BT31 | 27842 | 189154 | ||
| Ferrol Coaling Co. Ltd | 1907 | BT31 | 18269 | 95634 | ||
| Ferryhill Coal Co. Ltd | 1875 | BT31 | 2115 | 9625 | ||
| Ffal Dau Collieries Co. Ltd | Pont-y-Cymmer | Glamorganshire | 1893 | BT31 | 31310 | 38674 |
| Ffaldau Colliery Co. Ltd | Garw Valley | Glamorganshire | 1884 | BT31 | 3309 | 19558 |
| Fforchneol Graig Coal Co. Ltd | 1922 | BT31 | 27000 | 179255 | ||
| Fforchneol Merthyr Colliery Co. Ltd | 1884 | BT31 | 3354 | 19974 | ||
| Ffos y go Colliery Co. Ltd | Brymbo | Denbighshire | 1904 | BT31 | 17245 | 81091 |
| Ffosfach Colliery Co. Ltd | 1909 | BT31 | 12879 | 104461 | ||
| Ffrith Colliery Co. Ltd | Brymbo | Denbighshire | 1865 | BT31 | 1132 | 2307C |
| Fiery Holes Colliery Co. Ltd | 1915 | BT31 | 23032 | 141987 | ||
| Fife Coal Co. Ltd | 1895 | BT2 | 2826 | |||
| Fifeshire Main Collieries Ltd | 1891 | BT31 | 5035 | 33790 | ||
| Fir Tree House Colliery Ltd | 1875 | BT31 | 2071 | 9168 | ||
| Firbeck Main Collieries Ltd | Firbeck | Yorkshire | 1913 | BT31 | 32172 | 132766 |
| Fire Engine Colliery Co. Ltd | 1907 | BT31 | 11996 | 93613 | ||
| Fishley Colliery Co. Ltd | Pelsall | Staffordshire | 1895 | BT31 | 15496 | 44448 |
| Fitzroy Bessemer Steel Hematite Iron & Coal Co. Ltd | 1873 | BT31 | 1809 | 6952 | ||
| Fitzwilliam Hemsworth Collieries Ltd | Hemsworth | Yorkshire | 1903 | BT31 | 10535 | 79587 |
| Flanog Colliery Co. Ltd | St Martins | Shropshire | 1894 | BT31 | 5762 | 40378 |
| Fleur De Lys Colliery Co. Ltd | 1902 | BT31 | 9632 | 71585 | ||
| Flimby & Broughton Moor Coal & Fire Brick Co. Ltd | Flimby | Cumberland | 1893 | BT31 | 15331 | 39390 |
| Flint Coal & Cannel Co. Ltd | Flint | Flintshire | 1883 | BT31 | 3169 | 18382 |
| Flint Colliery Co. Ltd | Flintshire | 1880 | BT31 | 2693 | 14481 | |
| Flint Marsh Colliery Co. Ltd | Flint | Flintshire | 1860 | BT31 | 513 | 2047 |
| Flitwick Coal Co. Ltd | 1904 | BT31 | 10920 | 82883 | ||
| Flockton Main Colliery & Brickworks Barnsley Ltd | Flockton | Yorkshire | 1896 | BT31 | 7116 | 50195 |
| Flockton Main Colliery Co. Ltd | Flockton | Yorkshire | 1885 | BT31 | 3431 | 20667 |
| Florchneol Colliery & Brick Co. Ltd | 1885 | BT31 | 3445 | 20800 | ||
| Florence Colliery Co. Ltd | Stoke-on-Trent | Staffordshire | 1891 | BT31 | 5184 | 35046 |
| Flosddu Anthracite Colliery Co. Ltd | 1911 | BT31 | 20022 | 115888 | ||
| Flour Mill Colliery Co. Ltd | 1873 | BT31 | 1919 | 7881 | ||
| Folkestone Coal Co. Ltd (The) | 1922 | BT31 | 27011 | 179368 | ||
| Foreign Coaling Co. Ltd | 1903 | BT31 | 10420 | 78515 | ||
| Forest of Dean & South Wales Iron Coal & Coke Co. Ltd | 1857 | BT31 | 260 | 861 | ||
| Forest of Dean Coal & Brick Co. Ltd | Gloucestershire | 1876 | BT31 | 2284 | 10992 | |
| Forest of Dean Coal & Mining Co | BT41 | 243 | 1384 | |||
| Forest of Dean Coal Mining Co. Ltd | 1872 | BT31 | 1763 | 6604 | ||
| Forest of Dean Coal Mining Co. Ltd | 1872 | BT31 | 1763 | 6604 | ||
| Forge Pool Colliery Co. Ltd | 1908 | BT31 | 12488 | 99290 | ||
| Formby Coal Co. Ltd | 1896 | BT31 | 6644 | 46726 | ||
| Forrest Wallsend Coal Syndicate Ltd | 1898 | BT31 | 7905 | 56656 | ||
| Fountain Barnsey Coal Sales Association Ltd (The) | 1936 | BT31 | 37783 | 317887 | ||
| Fowey Coaling Co. Ltd | 1901 | BT31 | 9540 | 70869 | ||
| Fowler’s Pontypridd Steam Coal Co. Ltd | 1874 | BT31 | 1982 | 8472 | ||
| Foxes Bridge Colliery Co. Ltd | Newnham | Gloucestershire | 1888 | BT31 | 14899 | 25632 |
| Foxfield Colliery Co. Ltd | Stoke-on-Trent | Staffordshire | 1893 | BT31 | 15313 | 38847 |
| Foxfield Colliery Ltd | Stoke-on-Trent | Staffordshire | 1918 | BT31 | 36906 | 151762 |
| Foxhole Collieries Ltd | Foxhole | Glamorganshire | 1894 | BT31 | 5899 | 41429 |
| Framwell Gate Coal & Coke Co. Ltd | Durham | Durham | 1885 | BT31 | 14788 | 20668 |
| Franco British Coal Co. Ltd | 1923 | BT31 | 27773 | 188256 | ||
| Fratton Coal Co. Ltd | 1908 | BT31 | 18485 | 98739 | ||
| French Peat Coal Syndicate Ltd | 1911 | BT31 | 32104 | 117224 | ||
| French Shale Oil & Coal Co. Ltd | 1912 | BT31 | 13947 | 123381 | ||
| Freystrop Colliery Co. Ltd | Pembrokeshire | 1900 | BT31 | 16426 | 66452 | |
| Fryston Coal Co. Ltd | Fryston | Yorkshire | 1873 | BT31 | 1867 | 7379 |
| Fryston Collieries Workmen’s Motor Co. Ltd | Fryston | Yorkshire | 1917 | BT31 | 23531 | 145869 |
| Furnace Coal & Brick Co. Ltd | 1911 | BT31 | 13533 | 114373 | ||
| Gadlys Coal & Iron Co. Ltd | 1872 | BT31 | 1783 | 6736 | ||
| Galchog Colliery Co. Ltd | Northop | Flintshire | 1871 | BT31 | 1645 | 5690 |
| Galghog & Northop Colliery Co. Ltd | 1865 | BT31 | 1183 | 2597C | ||
| Galician Coal Syndicate Ltd | 1912 | BT31 | 20424 | 119780 | ||
| Gapshields Colliery Co. Ltd | 1914 | BT31 | 22626 | 138631 | ||
| Gardden Lodge Coal Co. Ltd | Ruabon | Denbighshire | 1880 | BT31 | 2701 | 14545 |
| Gardden Lodge Coal Coke & Fire Brick Co. Ltd | Ruabon | Denbighshire | 1875 | BT31 | 2074 | 9202 |
| Garn Mill Anthracite Colliery Co. Ltd | 1902 | BT31 | 9981 | 74527 | ||
| Garnant Anthracite Collieries Ltd | Garnant | Carmarthenshire | 1909 | BT31 | 18781 | 102288 |
| Garnant Collieries Co. Ltd | Garnant | Carmarthenshire | 1874 | BT31 | 1949 | 8187 |
| Garnet Colliery Co. Ltd | 1912 | BT31 | 20663 | 121949 | ||
| Garnswllt Anthracite Colliery Co. Ltd | 1925 | BT31 | 28952 | 204236 | ||
| Garnswllt Colliery Co. Ltd | 1875 | BT31 | 2066 | 9125 | ||
| Garrockhill & Duchray Coal Co. Ltd | 1887-1895 | BT2 | 1678 | |||
| Garswood Coal & Iron Co. Ltd | Ashton-in-Makerfield | Lancashire | 1873 | BT31 | 14468 | 7837 |
| Garswood Hall Collieries Co. Ltd | Ashton-in-Makerfield | Lancashire | 1883 | BT31 | 3136 | 18082 |
| Garswood Hall Collieries Co. Ltd | Ashton-in-Makerfield | Lancashire | 1905 | BT31 | 36858 | 86547 |
| Garth Rhondda Colliery Co. Ltd | Taffs Well | Glamorganshire | 1910 | BT31 | 13238 | 109471 |
| Gartness Coal Co. Ltd | 1882-1905 | BT2 | 1165 | |||
| Garw & Braichycymer Collieries Ltd | 1903 | BT31 | 10189 | 76417 | ||
| Garw Coal Co. Ltd | 1904 | BT31 | 10865 | 82452 | ||
| Garw Llantwit Colliery Co. Ltd | 1891 | BT31 | 5081 | 34190 | ||
| Garw Valley Collieries Co. Ltd | 1875 | BT31 | 2069 | 9148 | ||
| Gauntlets Coal Co. Ltd | 1888 | BT31 | 4021 | 25619 | ||
| Gawber Colliery Co. Ltd | Barnsley | Yorkshire | 1897 | BT31 | 7685 | 54865 |
| Gawber Colliery Co. Ltd | Barnsley | Yorkshire | 1918 | BT31 | 24159 | 151264 |
| Gelli Dare Colliery Co. Ltd | Aberdare | Glamorganshire | 1908 | BT31 | 12303 | 97020 |
| Gelligaled Colliery Co. Ltd | Ystrad Rhondda | Glamorganshire | 1915 | BT31 | 22937 | 141188 |
| Gellihir Colliery Co. Ltd | Llangonoyd | Glamorganshire | 1906 | BT31 | 11687 | 90464 |
| Gellyceidrim Collieries Co. Ltd | Garnant | Carmarthenshire | 1891 | BT31 | 15158 | 34237 |
| Gellyceidrim Collieries Co. Ltd | Garnant | Carmarthenshire | 1927 | BT31 | 32878 | 225896 |
| Gellydeg Colliery Co. Ltd | 1873 | BT31 | 1921 | 7906 | ||
| Gellygron Colliery Co. Ltd | 1904 | BT31 | 10857 | 82391 | ||
| Gellynudd Colliery Co. Ltd | 1908 | BT31 | 18510 | 99087 | ||
| Gellyonen Collieries Ltd | 1902 | BT31 | 10127 | 75867 | ||
| Gelynog Colliery Co. Ltd | 1899 | BT31 | 8431 | 61352 | ||
| Gelynog Llantwit Colliery Co. Ltd | 1864 | BT31 | 953 | 1284C | ||
| Gendros Coal & Brick Co. Ltd | Forest Fach | Glamorganshire | 1898 | BT31 | 16030 | 58337 |
| General Co. operative Colliery Co. Ltd | 1871 | BT31 | 1603 | 5382 | ||
| General Coal Co. Ltd | 1870 | BT31 | 1518 | 4761 | ||
| George Town Collieries Ltd | 1912 | BT31 | 21129 | 126211 | ||
| Gerhardine Colliery Co. Ltd | 1880 | BT31 | 2714 | 14631 | ||
| Gibb’s Navigation Collieries Ltd | Cymmer | Glamorganshire | 1913 | BT31 | 21610 | 130218 |
| Gidlow Iron & Coal Co. Ltd | 1881 | BT31 | 2895 | 16076 | ||
| Gilcrux Colliery Co. Ltd | 1866 | BT31 | 1223 | 2827C | ||
| Gilfach Anthracite Collieries Ltd | Cwmtwrch Uchaf | Breconshire | 1909 | BT31 | 12844 | 103934 |
| Gilfach Colliery Co. Ltd | Upper Cwmtwrch | Breconshire | 1891 | BT31 | 5202 | 35216 |
| Gilgarran Coal Co. Ltd | Workington | Cumberland | 1875 | BT31 | 2081 | 9266 |
| Gillhead Coal Firebrick & Gannister Co. Ltd | Flimby | Cumberland | 1897 | BT31 | 15761 | 52063 |
| Gilmerton Gas Coal Co. Ltd | 1886-1896 | BT2 | 1572 | |||
| Gilvach Coal | 1862 | BT31 | 634 | 2658 | ||
| Gilwen Colliery Co. Ltd | Cwm-twrch Uchaf | Glamorganshire | 1900 | BT31 | 16498 | 67670 |
| Glamorgan Coal Co. Ltd | Pontypridd | Glamorganshire | 1862 | BT31 | 609 | 2556 |
| Glamorgan Coal Co. Ltd | Gilfach Goch | Glamorganshire | 1892 | BT31 | 31780 | 35580 |
| Glamorgan Iron & Coal Co. Ltd | Glamorganshire | 1865 | BT31 | 1118 | 2221C | |
| Glamorgan Merthyr Colliery Co. Ltd | Glamorganshire | 1870 | BT31 | 1552 | 4990 | |
| Glamorganshire Consolidated Collieries Ltd | Glamorganshire | 1874 | BT31 | 1957 | 8254 | |
| Glan Garnant & Noyadd Collieries Ltd | Ammanford | Glamorganshire | 1908 | BT31 | 18332 | 96477 |
| Glan Garnant Colliery Co. Ltd | 1899 | BT31 | 8751 | 64077 | ||
| Glanamman Anthracite Collieries Ltd | Glanamman | Carmarthenshire | 1907 | BT31 | 11976 | 93436 |
| Glanddu Colliery Co. Ltd | 1920 | BT31 | 26230 | 170730 | ||
| Glanmwrwg Colliery Co. Ltd | Llangennech | Carmarthenshire | 1904 | BT31 | 10917 | 82856 |
| Glanwern & Tyrisaf Collieries Co. Ltd | Llansamlet | Glamorganshire | 1897 | BT31 | 7362 | 52173 |
| Glascoed Colliery Co. Ltd | Ffrith | Denbighshire | 1912 | BT31 | 20522 | 120709 |
| Glascote Colliery Co. Ltd | Amington | Worcestershire | 1911 | BT31 | 36888 | 116193 |
| Glasgow & Cape Breton (Nova Scotia) Coal & Railway Co. Ltd | Nova Scotia | Canada | 1871 | BT31 | 1587 | 5243 |
| Glasgow Coal & Colliery Co. Ltd | 1875-1881 | BT2 | 644 | |||
| Glass Houghton & Castleford Collieries Ltd | Castleford | Yorkshire | 1924 | BT31 | 36929 | 199502 |
| Glass Houghton & Castleford Collieries Ltd | Castleford | Yorkshire | 1902 | BT31 | 16949 | 75914 |
| Glass Houghton Collieries Ltd | Castleford | Yorkshire | 1902 | BT31 | 9953 | 74258 |
| Glen Colliery Co. Ltd | Barnsley | Yorkshire | 1924 | BT31 | 28540 | 198287 |
| Glenavon Rhondda Collieries Co. Ltd | Cymmer | Glamorganshire | 1899 | BT31 | 8613 | 62771 |
| Glenesk Colliery Ltd | 1918 | BT31 | 24187 | 151495 | ||
| Glenhafod Collieries Ltd | Aberafan | Glamorganshire | 1920 | BT31 | 37286 | 170147 |
| Globe Collieries Ltd | Cwm-twrch Uchaf | Glamorganshire | 1914 | BT31 | 22147 | 134689 |
| Glodwick Coal & Fireclay Co. Ltd | Roundthorn | Lancashire | 1893 | BT31 | 5593 | 38944 |
| Gloucester Direct Coal Supply Ltd | 1911 | BT31 | 13786 | 119362 | ||
| Gloucestershire Coal Mining Co. Ltd | BT41 | 258 | 1472 | |||
| Gloucestershire Coal Mining Co. Ltd | 1859 | BT31 | 397 | 1503 | ||
| Gloucestershire Coal Mining Co. Ltd | 1859 | BT31 | 397 | 1503 | ||
| Gloucestershire United Collieries Ltd | 1927 | BT31 | 29761 | 219855 | ||
| Glyn & Blaentrch Colliery Co. Ltd | 1865 | BT31 | 1141 | 2353C | ||
| Glyn Abbey Colliery Co. Ltd | 1909 | BT31 | 12639 | 101205 | ||
| Glyn Colliery Co. Ltd | Tonyrefail | Glamorganshire | 1880 | BT31 | 2655 | 14121 |
| Glyn Main Coal Co. Ltd | 1907 | BT31 | 11860 | 92211 | ||
| Glyn Neath Collieries Ltd | 1880 | BT31 | 2708 | 14596 | ||
| Glyn Neath Collieries Ltd | 1921 | BT31 | 26839 | 177494 | ||
| Glyn Neath Steam Coal & Iron Co. Ltd | 1862 | BT31 | 707 | 68C | ||
| Glyn Ogwr Llantwit Coal Co. Ltd | 1872 | BT31 | 1778 | 6708 | ||
| Glyncoed Collieries Ltd | Llanelli | Carmarthenshire | 1911 | BT31 | 19907 | 114601 |
| Glyncorrwg Coal Co. Ltd | Briton Ferry | Glamorganshire | 1859 | BT31 | 387 | 1451 |
| Glyncorrwg Colliery Co. Ltd | Briton Ferry | Glamorganshire | 1869 | BT31 | 1492 | 4609 |
| Glyncorrwg Colliery Co. Ltd | Briton Ferry | Glamorganshire | 1880 | BT31 | 14645 | 13881 |
| Glyncorrwg Colliery Co. Ltd | Briton Ferry | Glamorganshire | 1890 | BT31 | 15048 | 30591 |
| Glyndwr Coal & Pitwood Co. Ltd | 1920 | BT31 | 25562 | 163809 | ||
| Glyndwr Coal & Pitwood Co. Ltd | 1920 | BT31 | 25562 | 163809 | ||
| Glynea & Castle Coal & Brick Co. Ltd | Llanelli | Carmarthenshire | 1900 | BT31 | 16390 | 65789 |
| Glyngwillim Colliery Co. Ltd | 1873 | BT31 | 1829 | 7108 | ||
| Glyngwilym Collieries Ltd | 1920 | BT31 | 25749 | 165743 | ||
| Glynhir (Steam Gas & House Coal) Collieries Ltd | 1906 | BT31 | 11696 | 90550 | ||
| Glynllech Anthracite Colliery Co. Ltd | 1911 | BT31 | 19948 | 115052 | ||
| Glynogwr Collieries Ltd | Gilfach Goch | Glamorganshire | 1910 | BT31 | 19313 | 108253 |
| Glynyreithin Anthracite Colliery Co. Ltd | Ammanford | Carmarthenshire | 1906 | BT31 | 11665 | 90215 |
| Gnoll Colliery Co. Ltd | Llantwit | Glamorganshire | 1870 | BT31 | 1542 | 4919 |
| Gnoll Colliery Co. Ltd | Llantwit | Glamorganshire | 1921 | BT31 | 26722 | 176159 |
| Gobowen Colliery Co. Ltd | 1874 | BT31 | 2043 | 8908 | ||
| Godreaman Graig Coal Co. Ltd | 1924 | BT31 | 28286 | 194876 | ||
| Goitre Wen Llangennech Merthyr Smokeless Steam Coal Co. Ltd | 1874 | BT31 | 1954 | 8230 | ||
| Goldenhill Ironstone Coal & Oil Syndicate Ltd | 1890 | BT31 | 4670 | 30723 | ||
| Golds Hill & Springfield Collieries Co. Ltd | 1892 | BT31 | 5287 | 36111 | ||
| Golds Hill Colliery Ltd | Golds Hill | Staffordshire | 1906 | BT31 | 11529 | 88863 |
| Gomersal Colliery Co. Ltd | Gomersal | Yorkshire | 1912 | BT31 | 20953 | 124547 |
| Goole Coal Consumers Supply Association Ltd | 1894 | BT31 | 5885 | 41338 | ||
| Goriach Coal Mining & Gypsum Works Ltd | 1900 | BT31 | 8986 | 66407 | ||
| Gors Goch Collieries Ltd | 1923 | BT31 | 27949 | 190494 | ||
| Gorse Colliery Co. Ltd | Dafen | Carmarthenshire | 1906 | BT31 | 11672 | 90298 |
| Gorsgoch Coal Coal Brick & Lime Co. Ltd | 1881 | BT31 | 2834 | 15569 | ||
| Gorsllan Colliery Co. Ltd | 1926 | BT31 | 29664 | 217468 | ||
| Gospel Oak Collieries (1916) Ltd | Tipton | Staffordshire | 1916 | BT31 | 23323 | 144251 |
| Gospel Oak Colliery Co. Ltd | Tipton | Staffordshire | 1896 | BT31 | 6715 | 47204 |
| Gower Lynch Colliery Co. Ltd | 1925 | BT31 | 29103 | 206449 | ||
| Gowerton Colliery & Brick Co. Ltd | Gowerton | Glamorganshire | 1896 | BT31 | 6679 | 46966 |
| Gowrie & Blockhouse Collieries Ltd | 1898 | BT31 | 8178 | 59151 | ||
| Graham Island (B.C.) Coal & Timber Syndicate Ltd | 1911 | BT31 | 20148 | 117041 | ||
| Graham’s Navigation (Merthyr) Collieries Ltd | Tredegar | Monmouthshire | 1905 | BT31 | 17373 | 83368 |
| Graig Coal Co. (Cardiff) Ltd | 1923 | BT31 | 27674 | 186952 | ||
| Graig Colliery Co. Ltd | 1920 | BT31 | 25976 | 168027 | ||
| Graig Ddu Colliery Co. Ltd | 1922 | BT31 | 32528 | 182828 | ||
| Graig Forest Colliery Co. Ltd | 1900 | BT31 | 9128 | 67597 | ||
| Graig Navigation Colliery Ltd | 1927 | BT31 | 29867 | 222415 | ||
| Graigfelen Colliery Co. Ltd | Clydach | Glamorganshire | 1909 | BT31 | 12653 | 101405 |
| Grange Lane Colliery Co. Ltd | Rotherham | Yorkshire | 1903 | BT31 | 10360 | 77988 |
| Grangemouth Coal Co. Ltd | 1894-1930 | BT2 | 2807 | |||
| Granville Colliery Co. Ltd | Swadlincote | Derbyshire | 1872 | BT31 | 37466 | 6454 |
| Gravesend & Milton Coal Consumers Co. Ltd | 1856 | BT31 | 33963 | 216 | ||
| Great Bettws Llautwrt Colliery Ltd | 1869 | BT31 | 1457 | 4366 | ||
| Great Bridge & Bloxwich Colliery Co. Ltd | 1875 | BT31 | 2093 | 9366 | ||
| Great Britain Coal Co. Ltd | 1895 | BT31 | 6258 | 44320 | ||
| Great Central Colliery Co. Ltd | Barnsley | Yorkshire | 1904 | BT31 | 10630 | 80460 |
| Great Grimsby Coal Salt & Tanning Co. Ltd | 1873 | BT31 | 1813 | 6984 | ||
| Great Grimsby Coal Supply Co. Ltd | Grimsby | Yorkshire | 1888 | BT31 | 31086 | 25701 |
| Great Harwood Coal Consumers Co. Ltd | Great Harwood | Lancashire | 1877 | BT31 | 2341 | 11434 |
| Great Harwood Colliery Co. Ltd | Great Harwood | Lancashire | 1898 | BT31 | 15994 | 57564 |
| Great Kanawha Colliery Co. Ltd | 1882 | BT31 | 3082 | 17623 | ||
| Great Morfa Collieries Co. Ltd | Llanelli | Carmarthenshire | 1896 | BT31 | 6750 | 47486 |
| Great Mountain Collieries Co. Ltd | Tumble | Carmarthenshire | 1891 | BT31 | 15144 | 33694 |
| Great Mountain Collieries Co. Ltd | Tumble | Carmarthenshire | 1927 | BT31 | 32879 | 225897 |
| Great Northern & Midland Coal Co. Ltd | 1860 | BT31 | 500 | 1978 | ||
| Great Western (Forest of Dean) Coal Consumers Co. Ltd | 1873 | BT31 | 1828 | 7106 | ||
| Great Western (Forest of Dean) Collieries Co. Ltd | 1884 | BT31 | 3328 | 19754 | ||
| Great Western Colliery Co. Ltd | Pontypridd | Glamorganshire | 1878 | BT31 | 2465 | 12601 |
| Great Western Colliery Co. Ltd | Rhondda | Glamorganshire | 1865 | BT31 | 1111 | 2182C |
| Great Western Colliery Co. Ltd | Pontypridd | Glamorganshire | 1890 | BT31 | 31193 | 30539 |
| Great Western Deep Coal Co. Ltd | 1863 | BT31 | 726 | 158C | ||
| Great Wyrley Colliery Co. Ltd | Cheslyn Hay | Staffordshire | 1871 | BT31 | 1616 | 5477 |
| Great Wyrley Colliery Co. Ltd (No.2) | Cheslyn Hay | Staffordshire | 1875 | BT31 | 30869 | 9669 |
| Great Yarmouth Mariners’ & Tradesmen’s Coal Co. Ltd | 1859 | BT31 | 384 | 1424 | ||
| Great Yarmouth Star of the East Coal Co. Ltd | 1856 | BT31 | 216 | 667 | ||
| Green Ings & Milton Main Coal Co. Ltd | 1879 | BT31 | 2569 | 13432 | ||
| Greenhill Colliery Co. Ltd | nd | BT2 | 3321 | |||
| Gresley Wood & Swadlincote Colliery Company | 1863 | BT31 | 816 | 613C | ||
| Greta Collieries Ltd | 1890 | BT31 | 4720 | 31146 | ||
| Grey Valley Coal Syndicate Ltd | 1906 | BT31 | 11772 | 91306 | ||
| Greyfield Colliery Co. Ltd | Somersetshire | Somersetshire | 1899 | BT31 | 16284 | 63977 |
| Greymouth (New Zealand) Coal Syndicate Ltd | 1906 | BT31 | 11406 | 87577 | ||
| Greymouth Point Elizabeth Railway & Coal Co. Ltd | 1893 | BT31 | 5521 | 38327 | ||
| Greystone Colliery Co. Ltd | Leeds | Yorkshire | 1917 | BT31 | 23685 | 147332 |
| Griff Colliery Co. Ltd | Nuneaton | Worcestershire | 1882 | BT31 | 3047 | 17294 |
| Grimethorpe Colliery Co. Ltd | Grimethorpe | Yorkshire | 1896 | BT31 | 7066 | 49776 |
| Gringley on the Mill Gas Light Coal & Coke Co. Ltd | 1870 | BT31 | 1508 | 4707 | ||
| Groeswem & Caradog Collieries Ltd | 1900 | BT31 | 8936 | 65891 | ||
| Groeswen Colliery Co. Ltd | 1899 | BT31 | 8296 | 60254 | ||
| Grosvenor Colliery Co. Ltd | Wrexham | Denbighshire | 1871 | BT31 | 1657 | 5802 |
| Grovesend Colliery Co. Ltd | 1868 | BT31 | 1435 | 4221 | ||
| Grovesend Steam Coal Collieries Co. Ltd | 1873 | BT31 | 1866 | 7369 | ||
| Gualey Kanawha Coal Co. Ltd | 1873 | BT31 | 1874 | 7436 | ||
| Guanta Railways Harbour & Coal Trust Co. Ltd | 1890 | BT31 | 4751 | 31393 | ||
| Guildford Coal Supply Co. Ltd | 1922 | BT31 | 27556 | 185528 | ||
| Guilford & Waldershare Colliery Co. Ltd | Guilford | Kent | 1917 | BT31 | 23728 | 147701 |
| Guinea Wallsend Colliery Co. Ltd | 1867 | BT31 | 1335 | 3504 | ||
| Guiseley & Yeadon Coal Co. Ltd | 1872 | BT31 | 14449 | 6831 | ||
| Gurnos Anthracite Collieries Co. Ltd | Ystradgynlais | Breconshire | 1909 | BT31 | 18838 | 102903 |
| Gurnos Anthracite Collieries Co. Ltd | Ystradgynlais | Breconshire | 1927 | BT31 | 32879 | 225898 |
| Gwalia Colliery Co. Ltd | 1904 | BT31 | 10649 | 80596 | ||
| Gwaun Cae Gurwen Colliery Co. Ltd | Llanelli | Glamorganshire | 1874 | BT31 | 30843 | 8551 |
| Gwendraeith Valleys Lime Coal & Railway Co. Ltd | 1868 | BT31 | 1388 | 3894 | ||
| Gwendraeth Anthracite Collieries Co. Ltd | Pontyates | Carmarthenshire | 1900 | BT31 | 8883 | 65383 |
| Gwendraeth Valley Anthracite Collieries Ltd | Pontyates | Carmarthenshire | 1927 | BT31 | 32879 | 225899 |
| Gwendraeth Valley Colliery Co. Ltd | Pontyates | Carmarthenshire | 1872 | BT31 | 1740 | 6429 |
| Gwern Collieries Ltd | 1895 | BT31 | 6516 | 45845 | ||
| Gwerna Colliery Co. Ltd | 1882 | BT31 | 2996 | 16858 | ||
| Gwrhay & Greenland Collieries Co. Ltd | 1896 | BT31 | 6605 | 46470 | ||
| Gwys Anthracite Collieries Co. Ltd | Upper Cwmtwrch | Glamorganshire | 1910 | BT31 | 13103 | 107811 |
| Gwys Anthracite Collieries Ltd | Gwys | Glamorganshire | 1920 | BT31 | 26197 | 170346 |
| H. & J. Colliery Syndicate Ltd | 1920 | BT31 | 25702 | 165254 | ||
| Hackney Coal Co. Ltd | 1915 | BT31 | 22853 | 140486 | ||
| Hadji Dimiter Coal Co. Ltd | 1913 | BT31 | 32168 | 131836 | ||
| Hadlow Gas Coal & Coke Co. Ltd | 1860 | BT31 | 475 | 1854 | ||
| Hafod Rhondda Colliery Co. Ltd | 1900 | BT31 | 8928 | 65837 | ||
| Hafod Rhondda Colliery Co. Ltd | 1925 | BT31 | 29060 | 205862 | ||
| Halifax & District Coal Supply Association Ltd | Halifax | Yorkshire | 1899 | BT31 | 16270 | 63767 |
| Halifax Coal Co. Ltd | Halifax | Yorkshire | 1877 | BT31 | 2351 | 11535 |
| Hallhill Coal Co. Ltd | 1889-1894 | BT2 | 1916 | |||
| Hamblet’s Collieries Ltd | 1922 | BT31 | 32531 | 183167 | ||
| Hamiltons Coaling Co. Ltd | 1890 | BT31 | 4804 | 31824 | ||
| Hamstead Colliery Co. Ltd | Great Barr | Staffordshire | 1875 | BT31 | 14531 | 9441 |
| Hamstead Officials Coal Co. Ltd | 1898 | BT31 | 8241 | 59794 | ||
| Handsworth Colliery Co. Ltd | 1869 | BT31 | 1495 | 4630 | ||
| Hanley & Bucknall Coal Co. Ltd | 1883 | BT31 | 3216 | 18760 | ||
| Hanley & Bucknall Coal Co. Ltd | 1867 | BT31 | 1376 | 3816 | ||
| Hanley Borough Colliery Co. Ltd | 1898 | BT31 | 8072 | 58185 | ||
| Hanley Collieries Ltd | Stoke-on-Trent | Staffordshire | 1912 | BT31 | 21006 | 125071 |
| Hanley Colliery Co. Ltd | Stoke-on-Trent | Staffordshire | 1880 | BT31 | 2725 | 14734 |
| Hanmer Portland Cement Coal & Coke Co. Ltd | 1883 | BT31 | 3164 | 18340 | ||
| Hants Co. operative Coal Co. Ltd | 1914 | BT31 | 22260 | 135668 | ||
| Harboro’ Hills Colliery Co. (1906) Ltd | Barnsley | Yorkshire | 1906 | BT31 | 11735 | 90949 |
| Harboro’ Hills Colliery Co. Ltd | Barnsley | Yorkshire | 1905 | BT31 | 11041 | 83945 |
| Harbury Railway Station & Town Gas Coal & Coke Co. Ltd | 1864 | BT31 | 884 | 935C | ||
| Hare Park Coal Co. Ltd | 1879 | BT31 | 2593 | 13633 | ||
| Haredale Coal Co. Ltd | 1898 | BT31 | 7959 | 57151 | ||
| Hargreaves Collieries Ltd | Burnley | Lancashire | 1932 | BT31 | 38053 | 267599 |
| Harperley Collieries Co. Ltd | Crook | Durham | 1908 | BT31 | 18572 | 99851 |
| Harrington Iron & Coal Co. Ltd | Lowca | Cumberland | 1908 | BT31 | 12351 | 97583 |
| Harris Coal Estates Ltd | 1897 | BT31 | 31487 | 50902 | ||
| Harris Coal Proprietary (Middlebury Transvaal) Ltd | 1896 | BT31 | 15672 | 49483 | ||
| Harris Navigation Coal Co. Ltd | Treharris | Glamorganshire | 1872 | BT31 | 1743 | 6440 |
| Harriseahead Colliery Co. Ltd | Harriseahead | Staffordshire | 1913 | BT31 | 21572 | 129872 |
| Harriseahead Colliery Co. Ltd | Harriseahead | Staffordshire | 1901 | BT31 | 9665 | 71849 |
| Harrogate Coal Association Ltd | Harrogate | Yorkshire | 1861 | BT31 | 566 | 2317 |
| Harrogate Coal Supply Co. Ltd | Harrogate | Yorkshire | 1894 | BT31 | 5991 | 42268 |
| Harthill Colliery Co. Ltd | 1920 | BT31 | 26130 | 169632 | ||
| Hartlepool Colliery Co. Ltd | Hartlepool | Durham | 1857 | BT31 | 250 | 830 |
| Harton Coal Co. Ltd (The) | South Shields | Durham | 1885 | BT31 | 39077 | 21477 |
| Hasland Colliery Co. Ltd | 1861 | BT31 | 603 | 2525 | ||
| Haswell, Shotton & Easington Coal & Coke Co. Ltd | Shotton | Durham | 1865 | BT31 | 1145 | 2384C |
| Hatfield Main Colliery Co. Ltd | Stainforth | Yorkshire | 1910 | BT31 | 36886 | 113261 |
| Haughhead Coal Co. Ltd | 1887 | BT2 | 1669 | |||
| Haunchwood Collieries Ltd | Nuneaton | Worcestershire | 1910 | BT31 | 19368 | 108695 |
| Havant & Hayling Docks Coal Co. Ltd | 1865 | BT31 | 1056 | 1865C | ||
| Hawkesbury Hall Colliery Ltd | 1901 | BT31 | 9462 | 70276 | ||
| Hawk’s Host Coal Co. Ltd | 1877 | BT31 | 2364 | 11649 | ||
| Hawne Collieries Co. Ltd | 1873 | BT31 | 1908 | 7766 | ||
| Haywood Colliery Co. Ltd | 1886 | BT31 | 3633 | 22404 | ||
| Hazel Colliery & Brick Co. (Barlborough) Ltd | Barlborough | Yorkshire | 1912 | BT31 | 20831 | 123433 |
| Hazelwell Colliery Co. Ltd | 1923 | BT31 | 28015 | 191444 | ||
| Hazlerigg & Burradon Coal Co. Ltd | Burradon | Northumberland | 1929 | BT31 | 38871 | 236529 |
| Heage Colliery Ltd | 1907 | BT31 | 12230 | 96149 | ||
| Healey Coal Co. Ltd | 1870 | BT31 | 1505 | 4682 | ||
| Heath End Colliery Co. Ltd | Short Heath | Staffordshire | 1925 | BT31 | 28994 | 204864 |
| Heather Colliery Co. Ltd | 1876 | BT31 | 2256 | 10779 | ||
| Heaths Dee Collieries Ltd | Holywell | Flintshire | 1902 | BT31 | 10070 | 75359 |
| Heckmondwike Collieries Ltd | Heckmondwike | Yorkshire | 1895 | BT31 | 6486 | 45679 |
| Hedley Fell Colliery Co. Ltd | 1923 | BT31 | 28271 | 194653 | ||
| Hedleys Collieries Co. Ltd | Heolycyw | Glamorganshire | 1904 | BT31 | 17198 | 80284 |
| Hednesford Colliery Co. Ltd | 1864 | BT31 | 1036 | 1753C | ||
| Heiligenberg Coal & Brick Co. Ltd | 1883 | BT31 | 3245 | 19037 | ||
| Hemsworth Colliery Co. Ltd | Hemsworth | Yorkshire | 1880 | BT31 | 2624 | 13899 |
| Hemyock Stone & Coal Co. Ltd | 1911 | BT31 | 13638 | 116386 | ||
| Hendreforgan Anthracite Colliery Co. Ltd | Gwys | Glamorganshire | 1907 | BT31 | 12223 | 96069 |
| Hendreforgan Colliery Co. Ltd | Gwys | Glamorganshire | 1874 | BT31 | 2026 | 8786 |
| Hendregarreg Colliery Co. Ltd | 1919 | BT31 | 25061 | 159173 | ||
| Hendregarreg Colliery Co. Ltd | 1868 | BT31 | 1430 | 4192 | ||
| Hendrewen Colliery Ltd | 1903 | BT31 | 10413 | 78443 | ||
| Hengoed Coal Brick & Stone Co. Ltd | 1913 | BT31 | 21886 | 132562 | ||
| Henley & Bucknall Coal Co. Ltd | 1879 | BT31 | 2554 | 13299 | ||
| Henley in Arden Gas Coal & Coke Co. Ltd | 1862 | BT31 | 33955 | 112c | ||
| Henllys Anthracite Collieries (1912) Ltd | Upper Cwmtwrch | Carmarthenshire | 1912 | BT31 | 20979 | 124828 |
| Henllys Collieries Co. Ltd | Carmarthenshire | 1907 | BT31 | 12082 | 94544 | |
| Henry Boys Brick & Colliery Co. Ltd | 1900 | BT31 | 9166 | 67943 | ||
| Henry’s Coals Ltd | 1927 | BT31 | 29791 | 220577 | ||
| Henshaw & Barcombe Colliery Co. Ltd | 1920 | BT31 | 26289 | 171297 | ||
| Henshaw & Melkridge Collieries Co. Ltd | 1875 | BT31 | 2063 | 9100 | ||
| Heolddu Colliery Co. Ltd | 1920 | BT31 | 26231 | 170731 | ||
| Hepscott Coal Co. Ltd | Hepscott | Northumberland | 1907 | BT31 | 12224 | 96088 |
| Herne Bay Coal & Iron Co. Ltd | 1911 | BT31 | 19942 | 114994 | ||
| Hesleyside Coal Co. Ltd | 1907 | BT31 | 12044 | 94124 | ||
| Hesleyside Colliery Co. Ltd | Bellingham | Northumberland | 1920 | BT31 | 25879 | 167084 |
| Hesperides Coaling Co. Ltd | 1895 | BT31 | 6271 | 44397 | ||
| Hetton Coal Co. Ltd | Hetton le Hole | Durham | 1884 | BT31 | 3358 | 20012 |
| Hicbibi Coal & Cannel Co. Ltd | Coppull | Lancashire | 1876 | BT31 | 2285 | 10996 |
| Hickleton Main Colliery Co. Ltd | Hickleton | Yorkshire | 1892 | BT31 | 38544 | |
| High Carr Coal & Ironstone Co. Ltd | 1874 | BT31 | 2052 | 8999 | ||
| High Delf Coal Co. Ltd | 1863 | BT31 | 766 | 372C | ||
| High Level Coal & Brick Co. Ltd | 1875 | BT31 | 2106 | 9524 | ||
| High Meadow Coal Co. Ltd | 1876 | BT31 | 2212 | 10423 | ||
| High Moor Colliery Co. Ltd | 1867 | BT31 | 1353 | 3652 | ||
| Highbridge Colliery Co. Ltd | Tipton | Staffordshire | 1925 | BT31 | 28901 | 203423 |
| Highbridge Harbour Brick & Coal Co. Ltd | 1859 | BT31 | 436 | 1679 | ||
| Higher Lane Colliery Ltd | Stalybridge | Lancashire | 1924 | BT31 | 28511 | 197866 |
| Highfield Collieries Co. Ltd | 1875 | BT31 | 2152 | 9976 | ||
| Highgate Colliery Company (1943) Ltd (The) | Highgate | Yorkshire | 1943 | BT31 | 37392 | 383688 |
| Highland Colliery Ltd | 1981 | BT2 | 1981 | 36530 | ||
| Hill Top Colliery Brick & Tile Co. Ltd | 1906 | BT31 | 17781 | 89076 | ||
| Hill Top Colliery Co. Ltd | 1922 | BT31 | 27641 | 186515 | ||
| Hill Top Colliery Co. Ltd | Hanley | Staffordshire | 1875 | BT31 | 2127 | 9739 |
| Hillhouserigg Coal Co. Ltd | 1892-1899 | BT2 | 2359 | |||
| Hilton Colliery Co. Ltd | Wolverhampton | Staffordshire | 1870 | BT31 | 1541 | 4912 |
| Hilton House & Red Moss Colliery Co. Ltd | 1874 | BT31 | 1938 | 8081 | ||
| Hilton Main & Holly Bank Collieries Ltd | Willenhall | Staffordshire | 1932 | BT31 | 33351 | 266468 |
| Hilton Main & Holly Bank Collieries Ltd | Willenhall | Staffordshire | 1935 | BT31 | 36708 | 299581 |
| Hindley Field Coal Co. Ltd | Hindley | Lancashire | 1892 | BT31 | 15243 | 36758 |
| Hirwain Coal & Iron Co. Ltd | Hirwain | Glamorganshire | 1865 | BT31 | 1095 | 2088C |
| Hobbs Hole Colliery Co. Ltd | Wednesbury | Staffordshire | 1898 | BT31 | 8141 | 58822 |
| Hocking Valley Coal Co. Ltd | 1892 | BT31 | 5378 | 36959 | ||
| Hockley Hall Collieries Co. Ltd | Dosthill | Worcestershire | 1872 | BT31 | 1768 | 6638 |
| Hodnet Coal Lime & Salt Co. Ltd | 1867 | BT31 | 1376 | 3810 | ||
| Holly Bank Colliery Co. Ltd | Wolverhampton | Staffordshire | 1891 | BT31 | 5209 | 35289 |
| Holly Bush Colliery Co. Ltd | 1916 | BT31 | 23190 | 143206 | ||
| Holly Greave Colliery Co. Ltd | 1920 | BT31 | 25806 | 166359 | ||
| Hollybank Coal Co. Ltd | Wolverhampton | Staffordshire | 1910 | BT31 | 32072 | 110561 |
| Hollybush Colliery & Coke Works | 1866 | BT31 | 1224 | 2836C | ||
| Holmes & Jordan Colliery Co. Ltd | Rotherham | Yorkshire | 1917 | BT31 | 23780 | 148152 |
| Holmes Farm Colliery Co. Ltd | Rotherham | Yorkshire | 1914 | BT31 | 22335 | 136262 |
| Holmside & South Moor Collieries Ltd | Stanley | Durham | 1889 | BT31 | 38704 | 29418 |
| Home Collieries Syndicate Ltd | 1896 | BT31 | 6695 | 47068 | ||
| Home Fires Colliery Ltd | 1920 | BT31 | 25577 | 163969 | ||
| Homer Hill Colliery Co. Ltd | 1874 | BT31 | 1997 | 8572 | ||
| Hook Anthracite Colliery Co. Ltd | 1920 | BT31 | 32463 | 171980 | ||
| Hopwood Colliery Ltd | Oldham | Lancashire | 1910 | BT31 | 19196 | 107158 |
| Horbury Bridge Coal Iron & Wagon Co. Ltd | 1873 | BT31 | 1911 | 7804 | ||
| Horden Collieries Ltd | Horden | Durham | 1900 | BT31 | 38253 | 64904 |
| Horley Corn & Coal Stores Ltd | 1897 | BT31 | 7301 | 51680 | ||
| Horsley Coal Co. Ltd | 1874 | BT31 | 1938 | 8085 | ||
| Houghton Main Colliery Co. Ltd | Houghton Main | Yorkshire | 1875 | BT31 | 2097 | 9451 |
| Houghton Main Colliery Co. Ltd | Houghton Main | Yorkshire | 1900 | BT31 | 37487 | 65129 |
| Household Coal (Southend) Ltd | 1922 | BT31 | 27593 | 185941 | ||
| Household Coal Ltd | 1914 | BT31 | 22517 | 137695 | ||
| Householders’ Coal Co. Ltd | 1856 | BT31 | 12 | 64 | ||
| Householders Mutual Colliery Association Ltd | 1863 | BT31 | 856 | 813C | ||
| Howbeach Coal Co. Ltd | 1858 | BT31 | 320 | 1122 | ||
| Howbeach Collieries Ltd | Howbeach | Gloucestershire | 1920 | BT31 | 25717 | 165410 |
| Howburn Coal Co. Ltd | Morpeth | Northumberland | 1894 | BT31 | 5984 | 42204 |
| Howden Clough Collieries Ltd | Birstall | Yorkshire | 1897 | BT31 | 31553 | 53647 |
| Howden Clough Colliery Ltd | Birstall | Yorkshire | 1890 | BT31 | 4684 | 30845 |
| Howley Park Coal & Cannel Co. Ltd | Batley | Yorkshire | 1922 | BT31 | 32510 | 179639 |
| Hoyland Silkstone Coal & Coke Co. Ltd | Hoyland | Yorkshire | 1888 | BT31 | 14955 | 27707 |
| Hoyland Silkstone Colliery Co. Ltd | Hoyland | Yorkshire | 1874 | BT31 | 1998 | 8580 |
| Hucknall Colliery Co. Ltd | 1898 | BT31 | 16018 | 58078 | ||
| Huena Piden (Chili) Colliery & Railway Co. Ltd | 1890 | BT31 | 4788 | 31699 | ||
| Hulam Coal Co. Ltd | 1898 | BT31 | 8170 | 59070 | ||
| Hull City Coal Co. Ltd | 1922 | BT31 | 27422 | 184081 | ||
| Hull Coal Trades’ Cricket & Sports Club Ltd | 1924 | BT31 | 28527 | 198096 | ||
| Hulme Colliery Co. Ltd | Stoke-on-Trent | Staffordshire | 1896 | BT31 | 6692 | 47050 |
| Humber Ice & Coal Co. Ltd | 1890 | BT31 | 4801 | 31796 | ||
| Hungarian Chrome Coal & Iron Co. Ltd | 1872 | BT31 | 1726 | 6320 | ||
| Hunsbury Hill Coal & Iron Co. Ltd | 1876 | BT31 | 2281 | 10961 | ||
| Hurst Colliery Co. Ltd | 1867 | BT31 | 1321 | 3428 | ||
| Hurst Lane Colliery Co. Ltd | 1894 | BT31 | 5991 | 42273 | ||
| Hurst Vale Colliery & Brick Co. Ltd | 1877 | BT31 | 2391 | 11905 | ||
| Hutton Henry Coal Co. Ltd | Wingate | Durham | 1873 | BT31 | 1856 | 7299 |
| Hyde Lane Colliery Co. Ltd | Hyde | Cheshire | 1892 | BT31 | 15220 | 36018 |
| Hythe Gas Coke & Coal Consumers Co. Ltd | 1867 | BT31 | 1327 | 3472 | ||
| Ibstock Colliery Co. Ltd | Leicestershire | 1873 | BT31 | 1892 | 7597 | |
| Idle & Eccleshill Coal Co. Ltd | 1861 | BT31 | 531 | 2133 | ||
| Ifton Colliery Co. Ltd | 1870 | BT31 | 1505 | 4687 | ||
| Ifton Rhyn Collieries Ltd | Ifton Rhyn | Shropshire | 1873 | BT31 | 1818 | 7025 |
| Ilfracombe Cooperative Coal Co. Ltd | 1872 | BT31 | 1700 | 6123 | ||
| Ilkeston Colliery Co. Ltd | 1873 | BT31 | 1911 | 7800 | ||
| Ilminster Gas Light Coal & Coke Co. Ltd | 1880 | BT31 | 30944 | 14327 | ||
| Imperial Brazilian Collieries Ltd | Brazil | 1871 | BT31 | 1635 | 5609 | |
| Imperial Navigation Coal Co. Ltd | Port Talbot | Glamorganshire | 1900 | BT31 | 31821 | 66053 |
| Imperial Steam & Household Coal Co. Ltd | 1867 | BT31 | 1326 | 3470 | ||
| Improved Smokeless Coal Co. Ltd | 1907 | BT31 | 12057 | 94258 | ||
| Ince Hall Coal & Canel Co. Ltd | Ince-in-Makerfield | Lancashire | 1871 | BT31 | 1608 | 5419 |
| Incorporated Association of Seaborne Coal Merchants Ltd (The) | 1933 | BT31 | 36485 | 281708 | ||
| Indian Coal & Mineral Syndicate Ltd | 1908 | BT31 | 18524 | 99262 | ||
| Indian Collieries Syndicate Ltd | 1902 | BT31 | 16809 | 73509 | ||
| Industrial Appliances & Oil & Coal Corporation Ltd | 1920 | BT31 | 32373 | 163692 | ||
| Industrial Coal & Iron Co. Ltd | 1872 | BT31 | 1724 | 6312 | ||
| Industrial Fuel & Coal Co. Ltd | 1922 | BT31 | 26977 | 179003 | ||
| Industrial Partnership Colliery Co. Ltd | 1873 | BT31 | 1868 | 7390 | ||
| Inghams Thornhill Collieries Ltd | Thornhill | Yorkshire | 1899 | BT31 | 37482 | 59850 |
| Ingleton Collieries Ltd | Ingleton | Yorkshire | 1903 | BT31 | 10371 | 78078 |
| Inland & Export Coal Co. Ltd | 1925 | BT31 | 29358 | 210600 | ||
| International Anthracite & Steam Coal Association Ltd | 1903 | BT31 | 17136 | 79184 | ||
| International Coal & Shipping Co. (Hull) Ltd | 1907 | BT31 | 12193 | 95759 | ||
| International Coal Co. Ltd | Abercraf | Glamorganshire | 1889 | BT31 | 14979 | 28735 |
| International General Artificial Coal & Fuel Co. Ltd | 1914 | BT31 | 14250 | 136881 | ||
| International Steam Coal Co. Ltd | 1886 | BT31 | 3673 | 22777 | ||
| Inverness Richmond Collieries & Railway Co. of Canada Ltd | 1900 | BT31 | 8995 | 66505 | ||
| Invicta Coal & Shipping Co. Ltd | 1919 | BT31 | 25307 | 161315 | ||
| Ipstones Park Colliery Co. Ltd | 1866 | BT31 | 1219 | 2802C | ||
| Irfon Coal Lime & General Supply Co. Ltd | 1868 | BT31 | 1382 | 3850 | ||
| Irish Coal & Iron Mining Co | Ireland | 1845 | BT41 | 323 | 1861 | |
| Irish Coal Syndicate Ltd | 1928 | BT31 | 30217 | 230502 | ||
| Irish Colliery Iron & Peat Co. | Ireland | 1845 | BT41 | 323 | 1862 | |
| Irwin River (W.A.) Coal Syndicate Ltd | 1911 | BT31 | 20166 | 117193 | ||
| Isca Coal Co. Ltd | 1906 | BT31 | 11566 | 89231 | ||
| Island Coal Co. Ltd | 1914 | BT31 | 22243 | 135496 | ||
| Island of Anglesea Coal & Coke Co. Ltd | 1857 | BT31 | 239 | 777 | ||
| Isle of Axholme Coal & Tillage Co. Ltd | 1872 | BT31 | 1778 | 6703 | ||
| Isle of Wight Coal Co. Ltd | 1864 | BT31 | 933 | 1182C | ||
| Isleworth Coal Co. Ltd | 1909 | BT31 | 12789 | 103108 | ||
| Italian Coal & Iron Co. Ltd | 1861 | BT31 | 593 | 2470 | ||
| Italian Shipping & Coal Co. Ltd | 1920 | BT31 | 26284 | 171262 | ||
| Ivy House & Northwood Colliery Co. Ltd | Hanley | Staffordshire | 1872 | BT31 | 1787 | 6777 |
| Jamaica Coaling Co. Ltd | 1914 | BT31 | 32196 | 138132 | ||
| James Lewis (Coal Merchants) Ltd | 1965 | BT31 | 42859 | 854972 | ||
| Jeffreston Anthracite Coal Co. Ltd | 1876 | BT31 | 2255 | 10769 | ||
| Joan Royd Coal Co. Ltd | Heckmondwike | Yorkshire | 1894 | BT31 | 6030 | 42614 |
| Joan Royd Colliery Co. Ltd | Heckmondwike | Yorkshire | 1892 | BT31 | 5257 | 35795 |
| Johannesberg Coal Co. Ltd | 1889 | BT31 | 4415 | 28711 | ||
| Johannesburg Central Collieries Ltd | 1889 | BT31 | 4569 | 29918 | ||
| John Williams & Son (Colliery Agents) Ltd | 1919 | BT31 | 32354 | 162027 | ||
| Johnson’s Shipley Coal Co. Ltd | Eglingham | Northumberland | 1902 | BT31 | 10121 | 75818 |
| Joint Stock Coal Co. Ltd | 1864 | BT31 | 1020 | 1658C | ||
| Jordan Colliery Co. Ltd | Rotherham | Yorkshire | 1899 | BT31 | 8379 | 60916 |
| Karbitz Colliery Co. Ltd | 1861 | BT31 | 574 | 2364 | ||
| Kelham Coal Exploration Syndicate Ltd | 1900 | BT31 | 9039 | 66868 | ||
| Kelvin Valley Coal Co. Ltd | 1914 | BT31 | 22059 | 133949 | ||
| Kendal & District United Coal Co. Ltd | 1857 | BT31 | 269 | 907 | ||
| Kendal Green Colliery Co. Ltd | Barnsley | Yorkshire | 1909 | BT31 | 18872 | 103318 |
| Kent & Sussex Iron & Coal Co. Ltd | 1860 | BT31 | 484 | 1908 | ||
| Kent & Sussex Iron & Coal Co. Ltd | 1860 | BT31 | 505 | 2006 | ||
| Kent Central Coal Estates Ltd | 1912 | BT31 | 20643 | 121785 | ||
| Kent Coal Concessions Ltd | 1902 | BT31 | 36626-3664 | 80693 | ||
| Kent Coal Development Trust Ltd | 1913 | BT31 | 14075 | 127578 | ||
| Kent Coal Exploration Co. Ltd | 1897 | BT31 | 7376 | 52299 | ||
| Kent Coal Finance & Development Co. Ltd | 1897 | BT31 | 7437 | 52840 | ||
| Kent Collieries Corporation Ltd | Dover | Kent | 1897 | BT31 | 7623 | 54422 |
| Kent Collieries Ltd | Dover | Kent | 1905 | BT31 | 17393 | 83668 |
| Kent Outcrop Coal Syndicate Ltd | 1911 | BT31 | 20071 | 116280 | ||
| Kentucky Timber Coal & Land Co. Ltd | 1894 | BT31 | 5904 | 41474 | ||
| Kenyon Coal & Iron Co. Ltd | 1864 | BT31 | 1013 | 1622C | ||
| Kenyon Colliery Company | 1863 | BT31 | 843 | 748C | ||
| Kepier Grange Colliery Co. Ltd | 1913 | BT31 | 21300 | 127743 | ||
| Keshan Collieries Ltd | 1900 | BT31 | 31828 | 67151 | ||
| Keswick Coal Co. Ltd (The) | 1928 | BT31 | 30397 | 235599 | ||
| Kidsgrove Steel Iron & Coal Co. Ltd | Kidsgrove | Staffordshire | 1888 | BT31 | 14910 | 26074 |
| Kidwelly Railway Line & Colliery Co. Ltd | 1869 | BT31 | 1485 | 4562 | ||
| Kilburne Colliery Ltd | 1890 | BT31 | 4655 | 30600 | ||
| Kilgetty Anthracite Colliery Co. Ltd | Pembrokeshire | 1935 | BT31 | 33580 | 297962 | |
| Kilgetty Colliery Co. Ltd | 1906 | BT31 | 11421 | 87765 | ||
| Killamarsh Coal Co. Ltd | 1866 | BT31 | 1276 | 3169 | ||
| Killan & Three Crosses Collieries Co. Ltd | 1873 | BT31 | 1867 | 7378 | ||
| Killan Collieries Ltd | 1920 | BT31 | 25768 | 165963 | ||
| Kilmersdon Colliery Co. Ltd | Somersetshire | Somersetshire | 1897 | BT31 | 15759 | 51997 |
| Kilsyth & Bonnybridge Coal Co. Ltd | 1893-1901 | BT2 | 2537 | |||
| Kilsyth Colliery Co. Ltd | 1886-1933 | BT2 | 1548 | |||
| Kimber Coal Co. Ltd | 1916 | BT31 | 23154 | 142952 | ||
| Kimberley Colliery Co. Ltd | 1900 | BT31 | 9150 | 67816 | ||
| Kimberworth Coal Co. Ltd | 1913 | BT31 | 14076 | 127580 | ||
| Kimberworth Coal, Fire Clay & Brick Co. Ltd | Rotherham | Yorkshire | 1906 | BT31 | 11773 | 91310 |
| Kimbolton Gas Coal & Coke Company | 1857 | BT31 | 278 | 945 | ||
| Kincoed Colliery Co. Ltd | 1919 | BT31 | 24480 | 153846 | ||
| King & Jones Coal Merchants Ltd | 1891 | BT31 | 5151 | 34788 | ||
| King’s Lynn Coal & Shipping Co. Ltd | 1920 | BT31 | 25979 | 168051 | ||
| Kings Moss Colliery Co. Ltd | 1882 | BT31 | 2918 | 16257 | ||
| Kingsbury Collieries Ltd | Tamworth | Worcestershire | 1878 | BT31 | 36753 | 12147 |
| Kingston Coal Co. Ltd | Cheshire | 1921 | BT31 | 26459 | 173216 | |
| Kingston Colliery Co. Ltd | Hyde | Cheshire | 1912 | BT31 | 20961 | 124632 |
| Kingswood & Parkfield Collieries Co. Ltd | Bristol | Gloucestershire | 1879 | BT31 | 2508 | 12938 |
| Kingswood Coal & Iron Co. Ltd | Bristol | Gloucestershire | 1864 | BT31 | 1028 | 1708C |
| Kinneil Cannel & Coking Coal Co. Ltd | 1893 | BT2 | 2557 | |||
| Kintyre Coal & Oil Co. Ltd | 1917 | BT31 | 23826 | 148488 | ||
| Kirkless Colliery Co. Ltd | Aspull | Lancashire | 1886 | BT31 | 3732 | 23246 |
| Kiveton Park Coal Co. Ltd | Kiveton Park | Yorkshire | 1895 | BT31 | 38228 | 45180 |
| Klip Colliery (Elandslaagte) Ltd | 1902 | BT31 | 9767 | 72762 | ||
| Klipfontein Coal Proprietary Co. Ltd | 1897 | BT31 | 7244 | 51228 | ||
| Knotts Colliery Co. Ltd | Padiham | Lancashire | 1895 | BT31 | 6459 | 45510 |
| Knowbury Colliery Co. Ltd | Knowbury | Shropshire | 1899 | BT31 | 8686 | 63393 |
| Kourna Iron & Akoumiani Yalia Coal Mines Ltd | 1910 | BT31 | 13229 | 109340 | ||
| Krawehl Coal Co. Ltd | 1890 | BT31 | 4727 | 31200 | ||
| Kromfontein Coal & Coke Co. Ltd | 1898 | BT31 | 8115 | 58572 |
