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Company Name |
Location |
Area |
Year |
Class |
Box No |
Company No |
| L & N Brown Coal Ltd | 1927 | BT31 | 36073 | 222527 | ||
| L & N Coal Distillation Ltd | 1927 | BT31 | 36072 | 219761 | ||
| La Nouvelle Fleur de Lys (Cardiff District) Colliery Co. Ltd | 1906 | BT31 | 11477 | 88335 | ||
| La Thuile Coal Mines Ltd | 1910 | BT31 | 19176 | 106887 | ||
| Labuan Coal Co. Ltd | 1860 | BT31 | 481 | 1885 | ||
| Ladyshore Coal Co. (1930) Ltd (The) | Little Lever | Lancashire | 1930 | BT31 | 37533 | 250044 |
| Ladyshore Coal Co. Ltd | Little Lever | Lancashire | 1907 | BT31 | 18007 | 92148 |
| Lafayette Coal Co. (“Societe Anonyme des Charbonnages Lafayette”)Ltd | 1908 | BT31 | 12499 | 99425 | ||
| Laffak & Garswood Colliery Co. Ltd | 1867 | BT31 | 1341 | 3560 | ||
| Lama (Italian) Coal Co. Ltd | 1865 | BT31 | 1059 | 1885C | ||
| Lambert’s Collieries Ltd | Pontyates | Carmarthenshire | 1893 | BT31 | 5543 | 38545 |
| Lambert’s Colliery Royalties Ltd | 1895 | BT31 | 6387 | 45106 | ||
| Lambert’s Improved Colliery Royalties Ltd | 1894 | BT31 | 6015 | 42470 | ||
| Lambton, Hetton & Joicey Collieries Ltd | Washington | Durham | 1896 | BT31 | 36829 | 48510 |
| Laminated Coal Ltd | 1919 | BT31 | 24778 | 156626 | ||
| Lampeter Coal Lime & General Supply Co. Ltd | Lampeter | 1877 | BT31 | 2342 | 11444 | |
| Lan Gas Coal Co. Ltd | 1910 | BT31 | 13320 | 110793 | ||
| Lancashire Cheshire & North Wales Colliery Owner’s Pitwood Association Ltd | 1917 | BT31 | 23785 | 148185 | ||
| Lancashire Coal Co. Ltd | 1877 | BT31 | 2320 | 11254 | ||
| Lancashire Collieries Association Ltd | 1886 | BT31 | 3614 | 22270 | ||
| Lancashire Colliery Owners Mutual Indemnity Association Ltd | 1933 | BT31 | 33467 | 281158 | ||
| Lancashire Rolling Mills & Colliery Supply Co. Ltd | 1920 | BT31 | 26410 | 172661 | ||
| Lancaster’s Steam Coal Collieries Ltd | Cwmtillery | Monmouthshire | 1891 | BT31 | 37040 | 34518 |
| Landgate Colliery Ltd | Ashton-in-Makerfield | Lancashire | 1934 | BT31 | 38067 | 294652 |
| Landshipping Colliery Co. Milford Haven Ltd | 1866 | BT31 | 1297 | 3301 | ||
| Lane Foot Coal Co. Ltd | 1882 | BT31 | 3039 | 17230 | ||
| Lanelay Colliery Co. Ltd | 1883 | BT31 | 3268 | 19228 | ||
| Lanelay Colliery Co. Ltd | 1866 | BT31 | 1307 | 3351 | ||
| Lange’s Anthracite Colliery Ltd | 1901 | BT31 | 9615 | 71451 | ||
| Langes Jesmond Collieries Ltd | 1902 | BT31 | 10006 | 74767 | ||
| Langleydale Coal Co. Ltd | Langleydale | Durham | 1924 | BT31 | 28531 | 198161 |
| Lantwit Coal Co. Ltd | 1864 | BT31 | 962 | 1335C | ||
| Lea Brook & Blakeley Wood Colliery Co. Ltd | Wednesbury | Staffordshire | 1898 | BT31 | 8216 | 59529 |
| Ledbury Gas Coal & Coke Co. Ltd | 1877 | BT31 | 34152 | 11586 | ||
| Leebotwood Colliery Co. Ltd | 1874 | BT31 | 1935 | 8042 | ||
| Leeds City Coal & Coke Co. Ltd | 1903 | BT31 | 10494 | 79185 | ||
| Leeds Coal Consumers Association Ltd | 1891 | BT31 | 15157 | 34197 | ||
| Leeds Coal Mining Co | Leeds | Yorkshire | BT41 | 351 | 2010 | |
| Leeswood Blast Furnace Coal Iron & Brick Co. Ltd | Mold | Flintshire | 1883 | BT31 | 3269 | 19240 |
| Leeswood Cannel & Gas Coal Co. Ltd | Coedtalon | Flintshire | 1862 | BT31 | 661 | 2791 |
| Leeswood Green Colliery Co. Ltd | Coedtalon | Flintshire | 1921 | BT31 | 32495 | 177557 |
| Leeswood Main Coal Cannel & Oil Co. Ltd | 1866 | BT31 | 1230 | 2870C | ||
| Legbrannock District Collieries Co. Ltd | 1884-1888 | BT2 | 1394 | |||
| Leicestershire Colliery & Pipe Co. Ltd (The) | Leicestershire | 1939 | BT31 | 40794 | 355695 | |
| Leighs Wood Colliery Co. Ltd | Aldridge | Staffordshire | 1874 | BT31 | 1957 | 8259 |
| Lesmahagow Coal Co. Ltd | 1890-1935 | BT2 | 2085 | |||
| Leversons Wallsend Collieries Ltd | Ushworth | Durham | 1918 | BT31 | 36365 | 149925 |
| Lewden Colliery Co. Ltd | Barnsley | Yorkshire | 1897 | BT31 | 7657 | 54650 |
| Lewes Coal Co. Ltd | 1924 | BT31 | 28428 | 196771 | ||
| Lewis Merthyr Consolidated Collieries Ltd | Trehafod | Glamorganshire | 1900 | BT31 | 16355 | 65300 |
| Lewis’s Graigola Colliery Co. Ltd | 1900 | BT31 | 8954 | 66074 | ||
| Lewis’s Merthyr Navigation Colliery Co. Ltd | Trehafod | Glamorganshire | 1881 | BT31 | 14679 | 15372 |
| Licensed Victualler’s Co. operative Coal Co. Ltd | 1873 | BT31 | 1891 | 7594 | ||
| Licensed Victuallers Colliery Co. Ltd | 1872 | BT31 | 1702 | 6130 | ||
| Lidgett Colliery Ltd | Sheffield | Yorkshire | 1883 | BT31 | 3209 | 18702 |
| Liekar & Bowsden Collieries Ltd | 1877 | BT31 | 2304 | 11130 | ||
| Lightwood Colliery Co. Ltd | 1890 | BT31 | 4714 | 31092 | ||
| Lilleshall Coal Distillation Co. Ltd | Shropshire | 1920 | BT31 | 25930 | 167553 | |
| Limehurst Coal Co. Ltd | Ashton-under-Lyne | Lancashire | 1880 | BT31 | 2726 | 14749 |
| Lincoln Coal & Coke Co. Ltd | 1873 | BT31 | 1844 | 7215 | ||
| Lincolnshire Estates Coal & Wagon Co. Ltd (The) | 1932 | BT31 | 38892 | 271456 | ||
| Lindridge Colliery Co. Ltd | 1876 | BT31 | 2183 | 10212 | ||
| Linrigg Coal Co. Ltd | 1891-1903 | BT2 | 2136 | |||
| Linrigg Coal Co. Ltd | 1883-1885 | BT2 | 1286 | |||
| Lintz Colliery Co. Ltd | 1857 | BT31 | 251 | 831 | ||
| Little Harwood Coal Coke Fire Clay & Sanitary Pipe Co. Ltd | Little Harwood | Lancashire | 1874 | BT31 | 1942 | 8106 |
| Little Mountain Anthracite Collieries Ltd | 1903 | BT31 | 10145 | 76049 | ||
| Little Mountain Coal Iron & Clay Co. Ltd | Buckley | Flintshire | 1871 | BT31 | 1628 | 5556 |
| Littleborough Fire Clay & Coal Co. Ltd | Littleborough | Lancashire | 1889 | BT31 | 4401 | 28612 |
| Littleburn & Adelaide Collieries Ltd | 1920 | BT31 | 32421 | 167128 | ||
| Littledean Woodside Coal Co. Ltd | 1873 | BT31 | 1817 | 7018 | ||
| Littleton Collieries Ltd | Huntington | Staffordshire | 1899 | BT31 | 36844 | 62508 |
| Liverpool Barge & Coaling Co. Ltd | 1905 | BT31 | 17558 | 85860 | ||
| Liversedge Coal Co. Ltd | Liversedge | Yorkshire | 1910 | BT31 | 19761 | 113107 |
| Llan Coal Co. Ltd | Glamorganshire | 1909 | BT31 | 13009 | 106293 | |
| Llan Colliery Co. Ltd | 1900 | BT31 | 9235 | 68545 | ||
| Llanburt Vardre Colliery | 1862 | BT31 | 668 | 2832 | ||
| Llancaiach Collieries Co. Ltd | Nelson | Glamorganshire | 1894 | BT31 | 5974 | 42128 |
| Llandebie Colliery Co. Ltd | Llandybie | Carmarthenshire | 1906 | BT31 | 17650 | 87201 |
| Llandrindod Coal Co. Ltd | 1913 | BT31 | 21606 | 130175 | ||
| Llandyry Anthracite Colliery Co. Ltd | Trimsaran | Carmarthenshire | 1892 | BT31 | 5469 | 37850 |
| Llanelly Anthracite Coal Co. Ltd | 1872 | BT31 | 1721 | 6288 | ||
| Llanelly Collieries Ltd | 1897 | BT31 | 7653 | 54624 | ||
| Llangeinor Colliery Co. Ltd | 1905 | BT31 | 11055 | 84056 | ||
| Llangennech Coal Co. Ltd | Llandebie | Carmarthenshire | 1875 | BT31 | 2169 | 10106 |
| Llangennech Collieries Co. Ltd | 1873 | BT31 | 1812 | 6964 | ||
| Llanharry Limestone Lime Gravel & Coal Co. Ltd | Llanharry | Glamorganshire | 1889 | BT31 | 15034 | 30240 |
| Llanidloes Gas Coal & Coke Co. Ltd | 1859 | BT31 | 34028 | 1472 | ||
| Llanmorlais Coal & Coke Co. Ltd | 1875 | BT31 | 2063 | 9101 | ||
| Llanmorlais Coal Co. Ltd | 1894 | BT31 | 5982 | 42192 | ||
| Llanmorlais Colliery Co. Ltd | Llanmorlais | Glamorganshire | 1861 | BT31 | 597 | 2490 |
| Llanmorlais Colliery Ltd | 1900 | BT31 | 8842 | 64939 | ||
| Llannon Coal Boring Syndicate Ltd | 1901 | BT31 | 9432 | 70077 | ||
| Llannon Colliery Co. Ltd | 1928 | BT31 | 30255 | 231654 | ||
| Llanon Valleys Anthracite Collieries (Llanelly) Ltd | 1922 | BT31 | 27054 | 179821 | ||
| Llanrwst Gas Light Coal & Coke Co. Ltd | 1856 | BT31 | 82 | 291 | ||
| Llansamlet Collieries Ltd | 1922 | BT31 | 27015 | 179409 | ||
| Llansamlet Colliery Co. Ltd | 1892 | BT31 | 5334 | 36543 | ||
| Llantrissant Iron & Coal Co. Ltd | 1865 | BT31 | 1159 | 2464C | ||
| Llantwit & Black Vein Coal Co. Ltd | 1873 | BT31 | 1914 | 7833 | ||
| Llantwit Coal Consumers Co. Ltd | 1873 | BT31 | 1842 | 7201 | ||
| Llantwit Colliery Co. Ltd | Llantwit | Glamorganshire | 1876 | BT31 | 2234 | 10591 |
| Llantwit Main Colliery Co. Ltd | 1865 | BT31 | 1114 | 2196C | ||
| Llantwit Red Ash Coal Co. Ltd | 1875 | BT31 | 2158 | 10020 | ||
| Llantwit United Collieries Ltd | 1902 | BT31 | 9825 | 73211 | ||
| Llantwit Vadre Colliery Co | 1862 | BT31 | 668 | 2832 | ||
| Llantwit Wallsend Colliery Co. Ltd | 1874 | BT31 | 1934 | 8022 | ||
| Llantwit Wallsend Colliery Co. Ltd | 1863 | BT31 | 859 | 822C | ||
| Llanwonno Colliery Co. Ltd | 1900 | BT31 | 9256 | 68743 | ||
| Llay Hall Coal & Clay Works Co. Ltd | 1881 | BT31 | 2849 | 15672 | ||
| Llay Hall Colliery Co. Ltd (The) | 1928 | BT31 | 37530 | 234326 | ||
| Llay Main Collieries Ltd | Llay | Denbighshire | 1913 | BT31 | 38330 | 130545 |
| Llayhall Coal Iron & Firebrick Co. Ltd | 1873 | BT31 | 1815 | 6995 | ||
| Llest Coal Co. Ltd | Garw Valley | Glamorganshire | 1876 | BT31 | 2247 | 10698 |
| Llest Llantwit Colliery Co. Ltd | 1896 | BT31 | 6974 | 49086 | ||
| Lletty Gwyn Anthracite Colliery Co. Ltd | 1923 | BT31 | 28270 | 194635 | ||
| Llettybrongu Colliery Co. Ltd | 1899 | BT31 | 8537 | 62156 | ||
| Lloyd’s Navigation Steam Coal Co. Ltd | 1914 | BT31 | 22256 | 135646 | ||
| Llwydcoed Collieries Ltd | 1898 | BT31 | 15944 | 56651 | ||
| Llwyn Colliery Co. Ltd | 1911 | BT31 | 20192 | 117492 | ||
| Llwyn Mawr Colliery Co. Ltd | 1907 | BT31 | 17996 | 92049 | ||
| Llwyndu Colliery Co. Ltd | 1920 | BT31 | 26363 | 172114 | ||
| Llwyndu Graigola Colliery & Brick Co. Ltd | 1884 | BT31 | 3374 | 20137 | ||
| Llwynonn Colliery Co. Ltd | 1916 | BT31 | 23499 | 145619 | ||
| Llyn Colliery Co. Ltd | 1882 | BT31 | 2954 | 16553 | ||
| Llyn Nantygo Colliery Co. Ltd | 1884 | BT31 | 3309 | 19564 | ||
| Llynvi Coal & Iron Co. Ltd | 1867 | BT31 | 1318 | 3415 | ||
| Llynvi Collieries Ltd | 1912 | BT31 | 35063 | 122686 | ||
| Llynvi Tondu & Ogmore Coal & Iron Co. Ltd | 1872 | BT31 | 1718 | 6258 | ||
| Llynvi Valley Colliery Co. Ltd | 1873 | BT31 | 1856 | 7304 | ||
| Loanda Coaling & Lighterage Co. Ltd | 1897 | BT31 | 7564 | 53924 | ||
| Lochner’s Navigation Coal & Coke Co. Ltd | 1903 | BT31 | 10461 | 78889 | ||
| Lochwood Coal Co. Ltd | 1894-1937 | BT2 | 2815 | |||
| Lockets Merthyr Collieries (1894) Ltd | Tonyrefail | Glamorganshire | 1894 | BT31 | 31790 | 42739 |
| Locket’s Merthyr Steam Coal Co. Ltd | Rhondda | Glamorganshire | 1877 | BT31 | 2394 | 11938 |
| Lockwoods Clean Coal Process Ltd | 1928 | BT31 | 32963 | 232056 | ||
| Lodge Colliery Co. Ltd | Gobowen | Shropshire | 1887 | BT31 | 3866 | 24380 |
| Lodge Farm Colliery Ltd | 1922 | BT31 | 27164 | 181250 | ||
| Lodge Holes Colliery Co. Ltd | Wednesbury | Staffordshire | 1902 | BT31 | 16751 | 72373 |
| Lodge Holes Colliery Co. Ltd | Wednesbury | Staffordshire | 1899 | BT31 | 8806 | 64567 |
| Lodna Colliery Co. Ltd | 1897 | BT31 | 15856 | 54589 | ||
| Lofthouse Colliery Ltd | Lofthouse | Yorkshire | 1872 | BT31 | 36740 | 6797 |
| Logan Coal Co. Ltd | 1870 | BT31 | 1561 | 5062 | ||
| Loganlea Coal Co. Ltd | 1893-1904 | BT2 | 2518 | |||
| Lon Las Colliery Co. Ltd | 1917 | BT31 | 23549 | 146022 | ||
| London & Continental Coal & Shipping Co. Ltd | 1890 | BT31 | 4894 | 32552 | ||
| London & Counties Coal & Trading Co. Ltd | 1903 | BT31 | 10177 | 76316 | ||
| London & County Coal Co. Ltd | 1866 | BT31 | 1283 | 3214 | ||
| London & General Victuallers Coal Co. Ltd | 1874 | BT31 | 2050 | 8978 | ||
| London & Grays Seaborne Coal Co. Ltd | 1894 | BT31 | 5901 | 41457 | ||
| London & Merthyr Steam Coal Co. Ltd | Hirwain | Glamorganshire | 1866 | BT31 | 1206 | 2735C |
| London & Newcastle Mutual Coal Association Ltd | 1878 | BT31 | 2455 | 12510 | ||
| London & Provincial Coal Co. Ltd | 1865 | BT31 | 1174 | 2543C | ||
| London & Provincial Consolidated Coal Co. Ltd | 1875 | BT31 | 2090 | 9372 | ||
| London & South Coast Coal Co. Ltd | 1897 | BT31 | 7231 | 51131 | ||
| London & South Wales Coal Co. Ltd | Treherbert | Glamorganshire | 1872 | BT31 | 1768 | 6634 |
| London & Suburban Coal Co. Ltd | 1865 | BT31 | 1177 | 2559C | ||
| London & Western Coal Co. Ltd | 1916 | BT31 | 23490 | 145559 | ||
| London Co. operative Coal Co. Ltd | 1866 | BT31 | 1254 | 3023 | ||
| London Co. operative Coal Society Ltd | 1871 | BT31 | 1667 | 5891 | ||
| London Coal & Iron Co. Ltd | 1900 | BT31 | 8980 | 66323 | ||
| London Coal Co. Ltd | 1891 | BT31 | 5070 | 34093 | ||
| London Coal Trading Co. Ltd | 1873 | BT31 | 1919 | 7890 | ||
| London County Co. Operative Coal Society Ltd | 1894 | BT31 | 5776 | 40478 | ||
| London General Coal Co. Ltd | 1861 | BT31 | 574 | 2363 | ||
| London Mutual Coal Co. Ltd | 1873 | BT31 | 1919 | 7886 | ||
| London Patent Coal Co. Ltd | 1864 | BT31 | 1023 | 1671C | ||
| London Shipping & Coal Agency Ltd | 1923 | BT31 | 28090 | 192403 | ||
| Long Buckby Gaslight Coke & Coal Co. Ltd | 1859 | BT31 | 30691 | 1443 | ||
| Long Framlington Coal Co. Ltd | Longframlington | Northumberland | 1898 | BT31 | 16031 | 58396 |
| Long Melford Gas & Coal Co. Ltd | 1888 | BT31 | 31114 | 26996 | ||
| Longhirst Grange Colliery Ltd | 1899 | BT31 | 8814 | 64659 | ||
| Longridge Coal & Cannel Co. Ltd | 1875 | BT31 | 14513 | 9120 | ||
| Longwitton & Greenleighton Coal & Lime Co. Ltd | Longwitton | Northumberland | 1874 | BT31 | 2011 | 8678 |
| Longwitton Ganister Coal & Lime Co. Ltd | Longwitton | Northumberland | 1883 | BT31 | 3235 | 18950 |
| Lorway Coal Co. Cape Breton Ltd | 1871 | BT31 | 1636 | 5611 | ||
| Lostock Colliery Co. Ltd | Westhoughton | Lancashire | 1913 | BT31 | 21549 | 129989 |
| Lothian Coal Co. Ltd | 1890 | BT2 | 1979 | |||
| Loughborough & Charnwood Forest Coal Co. Ltd | 1882 | BT31 | 30987 | 17688 | ||
| Loughor Colliery Co. (1910) Ltd | Loughor | Glamorganshire | 1910 | BT31 | 19772 | 113208 |
| Loughor Colliery Co. (1920) Ltd | Loughor | Glamorganshire | 1920 | BT31 | 32464 | 172162 |
| Loughor Colliery Co. Ltd | Loughor | Glamorganshire | 1876 | BT31 | 2289 | 11026 |
| Loughor Colliery Co. Ltd | Loughor | Glamorganshire | 1889 | BT31 | 4321 | 28080 |
| Low Beechburn Coal Co. Ltd | Crook | Durham | 1889 | BT31 | 15021 | 29896 |
| Low Moor Coke Co. Ltd | Bradford | Yorkshire | 1929 | BT31 | 33120 | 242029 |
| Low Temperature Coal Products Ltd | 1931 | BT31 | 33305 | 261160 | ||
| Lowestoft Coaling Co. Ltd | 1919 | BT31 | 43019-4302 | 159484 | ||
| Lowside Colliery Co. Ltd | 1873 | BT31 | 1886 | 7538 | ||
| Luhrig Coal & Ore Washing Machine Co. Ltd | 1884 | BT31 | 3390 | 20300 | ||
| Lydbrook Colliery Co. Ltd | 1883 | BT31 | 3201 | 18634 | ||
| Lydbrook Deep Level Collieries Co. Ltd | 1866 | BT31 | 1286 | 3228 | ||
| Lydney District Brickworks & Collieries Ltd | Gloucestershire | 1923 | BT31 | 28219 | 193955 | |
| Machen Stone Lime & Colliery Co. Ltd | 1902 | BT31 | 16832 | 73909 | ||
| Macnab Stratified Coal Ltd | 1922 | BT31 | 32551 | 186242 | ||
| Madeley Coal & Iron Co. Ltd | Leycett | Staffordshire | 1880 | BT31 | 2654 | 14116 |
| Madeley Coal Coke & Brick Co. (1905) Ltd | Leycett | Staffordshire | 1905 | BT31 | 17480 | 84912 |
| Madeley Collieries Ltd | Newcastle-under-Lyne | Staffordshire | 1924 | BT31 | 36931-3693 | 202005 |
| Maendy Colliery Co. Ltd | Bryncethin | Glamorganshire | 1919 | BT31 | 32304 | 157454 |
| Maes y Dre Colliery & Iron Ore Co. Ltd | 1865 | BT31 | 1176 | 2556C | ||
| Maes y Marchog Colliery Co. Ltd | Onllwyn | Glamorganshire | 1885 | BT31 | 3553 | 21719 |
| Maesmawr Colliery Co. Ltd | 1875 | BT31 | 2097 | 9445 | ||
| Maesmawr Llantwit Colliery Co. Ltd | 1900 | BT31 | 9229 | 68501 | ||
| Maesmelyn Colliery Co. Ltd | 1913 | BT31 | 21573 | 129877 | ||
| Maesycwmmer Brick Stone & Coal Co. Ltd | Maesycwmmer | Monmouthshire | 1912 | BT31 | 20795 | 123147 |
| Maginnis (Coal Merchants) Ltd | 1912 | BT31 | 20473 | 120275 | ||
| Main Coal & Cannel Co. Ltd | 1876 | BT31 | 2249 | 10720 | ||
| Main Colliery Co. Ltd | Neath | Glamorganshire | 1889 | BT31 | 31167 | 29139 |
| Main Seam Coal Co. Ltd | 1929 | BT31 | 30464 | 237949 | ||
| Major’s Barn Colliery Co. Ltd | 1886 | BT31 | 3629 | 22377 | ||
| Maltby Main Colliery Co. Ltd | Maltby | Yorkshire | 1907 | BT31 | 34851-3485 | 93304 |
| Manchester & District Co. operative Coal Co. Ltd | 1873 | BT31 | 1852 | 7271 | ||
| Manchester Coal Exchange Cafe Ltd | 1919 | BT31 | 25207 | 160396 | ||
| Manchester Coal Tar Products Co. Ltd | 1916 | BT31 | 23399 | 144853 | ||
| Manchester Collieries Ltd | Pendlebury | Lancashire | 1929 | BT31 | 38041 | 237654 |
| Manchester Oil Coal Syndicate Ltd | 1913 | BT31 | 21916 | 132813 | ||
| Manchester Salford & District Coal Retailers Association Trading Co. Ltd | 1920 | BT31 | 26192 | 170291 | ||
| Mangotsfield Collieries Co. Ltd | 1880 | BT31 | 2665 | 14195 | ||
| Mangotsfield Victory Colliery Co. Ltd | 1885 | BT31 | 3536 | 21578 | ||
| Manners Colliery Ltd | Ilkeston | Derbyshire | 1898 | BT31 | 31639 | 58355 |
| Manor Collieries Co. Ltd | 1888 | BT31 | 4264 | 27655 | ||
| Manor Collieries Ltd | 1922 | BT31 | 27024 | 179510 | ||
| Manor Haigh Moor Colliery Ltd | Wakefield | Yorkshire | 1912 | BT31 | 37981 | 120276 |
| Manor Silkstone Coal Co. Ltd | Wakefield | Yorkshire | 1873 | BT31 | 1900 | 7676 |
| Manston Coal Co. Ltd | Leeds | Yorkshire | 1872 | BT31 | 1746 | 6475 |
| Manvers Main Colliery Co. Ltd | Wath upon Dearne | Yorkshire | 1888 | BT31 | 4041 | 25797 |
| Maplehurst Coal & Brick Co. Ltd | 1925 | BT31 | 29244 | 208529 | ||
| Marchowel Colliery Co. Ltd | 1899 | BT31 | 8542 | 62192 | ||
| Margate & District Coal Co. Ltd | 1888 | BT31 | 4297 | 27888 | ||
| Maria Anna & Steinbank Coal & Coke Co. Ltd | 1857 | BT31 | 289 | 992 | ||
| Marinha Grande Charcoal Iron Works & Mining Co. Ltd | 1873 | BT31 | 1821 | 7053 | ||
| Maritime Coal Co. Ltd | Pontypridd | Glamorganshire | 1885 | BT31 | 3433 | 20699 |
| Markham Main Colliery Ltd | Doncaster | Yorkshire | 1915 | BT31 | 38547 | |
| Markham Steam Coal Co. Ltd | Blackwood | Monmouthshire | 1910 | BT31 | 36883 | 110105 |
| Marple Bridge Colliery Co. Ltd | 1927 | BT31 | 29928 | 223694 | ||
| Marple Coal & Fire Clay Co. Ltd | 1875 | BT31 | 2163 | 10070 | ||
| Marracuene Collieries (Mozambique) Ltd | 1918 | BT31 | 24005 | 150009 | ||
| Martland & Martin Collieries Ltd | Appley Bridge | Lancashire | 1922 | BT31 | 27504 | 184965 |
| Marudu Bay (Borneo) Coal Syndicate Ltd | 1903 | BT31 | 16969 | 76300 | ||
| Marylebone Coal Co. Ltd | 1927 | BT31 | 29715 | 218672 | ||
| Matthew’s Patent Gas & Coal Stove Syndicate Ltd | 1913 | BT31 | 21429 | 128744 | ||
| Mc Kenzie Patent Gas Coal Co. Ltd | 1872 | BT31 | 1684 | 6002 | ||
| Meadow Cliff Colliery Co. Ltd | 1915 | BT31 | 22937 | 141191 | ||
| Mediterranean Coal Co. Ltd | 1894 | BT31 | 5747 | 40233 | ||
| Mediterranean Coal Mining Syndicate Ltd | 1910 | BT31 | 13072 | 107361 | ||
| Mediterranean Coal Mining Syndicate Ltd | 1910 | BT31 | 13072 | 107361 | ||
| Mediterranean Coal Syndicate Ltd | 1919 | BT31 | 24368 | 152886 | ||
| Mediterranean Colliery Co. Ltd | 1874 | BT31 | 1998 | 8585 | ||
| Mediterranean Steam Coal & Iron Co. Ltd | 1900 | BT31 | 9274 | 68930 | ||
| Mediterranian Ports Coaling Co. Ltd | 1920 | BT31 | 32358 | 162383 | ||
| Medway Coal Exploration Syndicate Ltd | 1909 | BT31 | 12828 | 103748 | ||
| Medway Consumers Coal Association Ltd | 1864 | BT31 | 925 | 1149C | ||
| Meiros Collieries (1931) Ltd | 1931 | BT31 | 33291 | 259683 | ||
| Meiros Collieries Ltd | Bridgend | Glamorganshire | 1887 | BT31 | 31083 | 25555 |
| Meiros Colliery Syndicate Ltd | 1912 | BT31 | 14030 | 125867 | ||
| Melincourt Collieries Ltd | Resolven | Glamorganshire | 1903 | BT31 | 10345 | 77848 |
| Melyn Collieries Ltd | 1920 | BT31 | 26199 | 170376 | ||
| Menai Collieries Ltd | 1912 | BT31 | 13889 | 121899 | ||
| Mercantile Coal Co. Ltd | 1866 | BT31 | 1309 | 3359 | ||
| Merches Coal & Steamship Co. Ltd | 1920 | BT31 | 25892 | 167184 | ||
| Mere Gas Coal & Coke Co. Ltd | 1866 | BT31 | 34077 | 2983c | ||
| Mergui Coal Syndicate Ltd | 1904 | BT31 | 10846 | 82285 | ||
| Mersey Coal Elevators Ltd | 1913 | BT31 | 32151 | 127653 | ||
| Merthyr House Coal Co. Ltd | 1865 | BT31 | 1070 | 1943C | ||
| Merthyr Llantwit Colliery Co. Ltd | 1920 | BT31 | 26208 | 170498 | ||
| Merton Coal & Trading Co. Ltd | 1922 | BT31 | 27028 | 179560 | ||
| Messrs Halliwells Free Medicine & Attendance Coal Club’s Co. Ltd | 1906 | BT31 | 11783 | 91432 | ||
| Metropolitan Co. operative Coal & Salt Supply Co. Ltd | 1874 | BT31 | 1974 | 8400 | ||
| Metropolitan Co. operative Coal Co. Ltd | 1874 | BT31 | 1929 | 7968 | ||
| Metropolitan Coal Co. of Sydney Ltd | 1886 | BT31 | 14833 | 22961 | ||
| Metropolitan Coal Consumers Association Ltd | 1889 | BT31 | 4334 | 28150 | ||
| Metropolitan Coal Consumers Co. | 1863 | BT31 | 844 | 755C | ||
| Metropolitan Consumers Coal Co. Ltd | 1860 | BT31 | 512 | 2039 | ||
| Metropolitan Counties Co. operative Coal Co. Ltd | 1873 | BT31 | 1839 | 7187 | ||
| Metropolitan Licensed Victuallers & Householder’s Collieries Association Ltd | 1873 | BT31 | 1908 | 7763 | ||
| Mexican Coal & Iron Co. Ltd | 1888 | BT31 | 4115 | 26449 | ||
| Mexican Coal Fields Syndicate Ltd | 1899 | BT31 | 8589 | 62546 | ||
| Mickley Coal Co. (Dronfield) Ltd | 1906 | BT31 | 17771 | 88885 | ||
| Mickley Coal Co. Ltd | Prudhoe | Northumberland | 1899 | BT31 | 38724 | 61859 |
| Mickley Colliery (Kilburn) Ltd | Kilburn | Derbyshire | 1917 | BT31 | 23682 | 147319 |
| Mid Cannock Colliery Co. Ltd | 1873 | BT31 | 1800 | 6876 | ||
| Mid Kent Coal & Trading Co. Ltd | 1911 | BT31 | 20364 | 119176 | ||
| Mid Kent Coal Syndicate Ltd | 1897 | BT31 | 7316 | 51795 | ||
| Mid Lancashire Coal & Cannel Co. Ltd | 1899 | BT31 | 16256 | 63449 | ||
| Mid Tyne Colliery Co. Ltd | 1926 | BT31 | 29389 | 211377 | ||
| Mid Wales Coal Co. Ltd | 1922 | BT31 | 27310 | 182789 | ||
| Mid Yorkshire Coal Sales Association Ltd (The) | Yorkshire | 1936 | BT31 | 36968 | 317258 | |
| Middelburg (Transvaal) Coal Fields Ltd | 1893 | BT31 | 5642 | 39340 | ||
| Middle Amman Coal & Ironstone Co. Ltd | Cwm Amman | Carmarthenshire | 1873 | BT31 | 1887 | 7541 |
| Middleburg Steam Coal & Coke Co. Ltd | 1906 | BT31 | 17816 | 89464 | ||
| Middlesex Mutual Coal Association Ltd | 1873 | BT31 | 1901 | 7694 | ||
| Middleton Coal Co. Ltd | 1892 | BT31 | 5424 | 37430 | ||
| Midland & Great Western Colliery Syndicate Ltd | 1905 | BT31 | 10994 | 83569 | ||
| Midland Coal Coke & Iron Co. Ltd | Newcastle-under-Lyne | Staffordshire | 1890 | BT31 | 4647 | 30551 |
| Midland Coal Coke & Iron Co. Ltd | Stoke-on-Trent | Staffordshire | 1892 | BT31 | 31786 | 40034 |
| Midland Coal Exports Ltd | 1922 | BT31 | 27255 | 182223 | ||
| Midland Coal Products Ltd | 1918 | BT31 | 33799 | 151573 | ||
| Midland Collieries Fatal Accident Insurance Co. Ltd | 1898 | BT31 | 31646 | 58527 | ||
| Midland Colliery Co. Ltd | 1866 | BT31 | 1267 | 3110 | ||
| Midland Counties & General Coal Co. Ltd | 1861 | BT31 | 560 | 2288 | ||
| Midland Patent Brick & Coal Co. Ltd | 1882 | BT31 | 3085 | 17651 | ||
| Midsomer Norton Gas & Coal Co. Ltd | 1869 | BT31 | 1483 | 4537 | ||
| Mill Farm Colliery Co. Ltd | Oldbury | Worcestershire | 1903 | BT31 | 17021 | 77274 |
| Millfield Grange Colliery Co. Ltd | Cockfield | Durham | 1900 | BT31 | 9088 | 67290 |
| Millheugh Colliery Ltd | 1896-1936 | BT2 | 3102 | |||
| Millwood Colliery Co. Ltd | 1875 | BT31 | 2098 | 9460 | ||
| Milnthorpe Gas Coal Coke & Lime Co. Ltd | 1860 | BT31 | 34037 | 1837 | ||
| Minera Coal & Iron Co. Ltd | 1864 | BT31 | 917 | 1107C | ||
| Minera Coal & Zinc Co. Ltd | 1863 | BT31 | 794 | 501C | ||
| Minerals Separation & Powell Duffryn Coal Treatment & Briquetting Co. Ltd | 1923 | BT31 | 32553 | 186848 | ||
| Minerals Separation Coal Recovery (Southern) Ltd | 1920 | BT31 | 25907 | 167327 | ||
| Mitcheldean Colliery Co. Ltd | 1876 | BT31 | 2178 | 10180 | ||
| Mitchell Main Colliery Co. Ltd | Barnsley | Yorkshire | 1882 | BT31 | 36777 | 17707 |
| Moat Hall Colliery Co. Ltd | Tipton | Staffordshire | 1913 | BT31 | 21792 | 131822 |
| Model Collieries Ltd | 1908 | BT31 | 12264 | 96563 | ||
| Modern Coal Co. Ltd | 1903 | BT31 | 10449 | 78750 | ||
| Mold Argoed Colliery Co. Ltd | Mold | Flintshire | 1871 | BT31 | 1668 | 5900 |
| Mold Collieries & Mines Ltd | 1873 | BT31 | 1869 | 7393 | ||
| Mold Collieries & Mines Ltd | 1873 | BT31 | 1869 | 7393 | ||
| Mold Collieries (1915) Ltd | Mold | Flintshire | 1915 | BT31 | 23014 | 141832 |
| Monckton Main Coal Co. Ltd | Barnsley | Yorkshire | 1874 | BT31 | 2021 | 8750 |
| Monk’s Ferry Steam Coal Co. Ltd | 1893 | BT31 | 5556 | 38651 | ||
| Monkwood Colliery Co. Ltd | Barlow | Derbyshire | 1865 | BT31 | 1072 | 1955C |
| Monmouthshire & South Wales Colliery Owners’ Pitwood Association Ltd | 1917 | BT31 | 23682 | 147320 | ||
| Monmouthshire Forage Coal & Haulage Co. Ltd | 1894 | BT31 | 5963 | 42048 | ||
| Mons Collieries Co. Ltd | 1856 | BT31 | 193 | 579 | ||
| Monway Colliery Co. Ltd | 1895 | BT31 | 6068 | 42959 | ||
| Moor Colliery Ltd | Gleadless | Derbyshire | 1919 | BT31 | 25403 | 162251 |
| Moorcroft Colliery Co. Ltd | 1895 | BT31 | 6068 | 42958 | ||
| Moorhouse Moor Coal, Ironstone & Fireclay Co. Ltd | 1872 | BT31 | 1754 | 6543 | ||
| Moorside Fire Brick Tile & Coal Co. Ltd | 1875 | BT31 | 2142 | 9889 | ||
| Moresby Coal Co. Ltd | Moresby | Cumberland | 1877 | BT31 | 36751 | 11719 |
| Moreton Colliery Co. Ltd | 1883 | BT31 | 3241 | 19004 | ||
| Moreton Hampstead Gas Light & Coal & Coke Co. Ltd | 1868 | BT31 | 1401 | 3987 | ||
| Morley Colliery Co. Ltd | Morley | Yorkshire | 1921 | BT31 | 26454 | 173158 |
| Morley Main Colliery Co. Ltd | Morley | Yorkshire | 1903 | BT31 | 10418 | 78492 |
| Morley West End Colliery Co. Ltd | Morley | Yorkshire | 1886 | BT31 | 3585 | 22021 |
| Morley West End Colliery Co. Ltd | Morley | Yorkshire | 1876 | BT31 | 2223 | 10506 |
| Morningside Coal Co. Ltd | 1895-1904 | BT2 | 3075 | |||
| Morpeth Collieries Co. Ltd | 1903 | BT31 | 10343 | 77835 | ||
| Morris Collieries Ltd | 1916 | BT31 | 23398 | 144832 | ||
| Morris Green Coal Co. Ltd | Great Lever | Lancashire | 1888 | BT31 | 4193 | 27124 |
| Morriston Coal & Coke Co. Ltd | 1892 | BT31 | 5298 | 36216 | ||
| Morriston Collieries Ltd | Morriston | Glamorganshire | 1898 | BT31 | 8071 | 58180 |
| Morwood Colliery Co. Ltd | 1945 | BT31 | 38110 | 402478 | ||
| Moseley Green Coal & Coke Co. Ltd | 1860 | BT31 | 499 | 1975 | ||
| Moseley Green United Collieries Ltd | Moseley Green | Gloucestershire | 1924 | BT31 | 32624 | 197178 |
| Moss Brick Tile Stone & Coal Co. Ltd | 1911 | BT31 | 13701 | 117649 | ||
| Moss Colliery Ltd | 1893 | BT31 | 5703 | 39870 | ||
| Moss Hall Coal Co. Ltd | Ince-in-Makerfield | Lancashire | 1867 | BT31 | 30762 | 3594 |
| Moston Colliery Co. Ltd | 1873 | BT31 | 1925 | 7943 | ||
| Mostyn Coal & Iron Co. Ltd | Mostyn | Flintshire | 1874 | BT31 | 1986 | 8502 |
| Mostyn Collieries Recovery Syndicate Ltd | 1906 | BT31 | 11544 | 89007 | ||
| Mostyn Colliery & Shipping Co. Ltd | 1900 | BT31 | 9286 | 69018 | ||
| Mostyn Colliery Co. Ltd | 1866 | BT31 | 1312 | 3384 | ||
| Mottram Wood Colliery Co. Ltd | Barnsley | Yorkshire | 1908 | BT31 | 18537 | 99401 |
| Mount Kembla Coal & Oil Co. Ltd | 1878 | BT31 | 14611 | 12594 | ||
| Mount Kembla Collieries Ltd | 1913 | BT31 | 35116 | 130026 | ||
| Mount Torlesse Collieries (Broken River N.Z.) Ltd | 1915 | BT31 | 22815 | 140182 | ||
| Mountain Colliery Co. Ltd | 1902 | BT31 | 10020 | 74922 | ||
| Mountain Mine Coal Co. Ltd | 1876 | BT31 | 2283 | 10984 | ||
| Mountain Mine Coal Co. Ltd | Ashton-under-Lyne | Lancashire | 1876 | BT31 | 2283 | 10984 |
| Mountain Mine Colliery Co. Ltd | 1911 | BT31 | 13512 | 113984 | ||
| Mountain Mine Colliery Co. Ltd | Wardle | Lancashire | 1911 | BT31 | 13512 | 113984 |
| Mountain Mine Colliery Co. Ltd | 1912 | BT31 | 20744 | 122690 | ||
| Mountain Mine Colliery Co. Ltd | Wardle | Lancashire | 1912 | BT31 | 20744 | 122690 |
| Moxley Colliery Co. Ltd | 1890 | BT31 | 4887 | 32492 | ||
| Murton Colliery Workmen’s Temperance & Literary Institute Co. Ltd | 1903 | BT31 | 17029 | 77372 | ||
| Musker Pulverized Coal Syndicate Ltd | 1928 | BT31 | 30226 | 230693 | ||
| Mutual Coal Association Ltd | 1872 | BT31 | 1760 | 6575 | ||
| Mwrwg Vale Collieries Ltd | 1900 | BT31 | 8989 | 66446 | ||
| Mynachdy Colliery Co. Ltd | 1900 | BT31 | 9134 | 67644 | ||
| Mynydd Newydd Colliery Co. (1935) Ltd | Fforest Fach | Glamorganshire | 1935 | BT31 | 37315 | 305991 |
| Mynydd y Gaer Collieries Ltd | 1920 | BT31 | 25965 | 167913 | ||
| Mynyddbach Y Glo Colliery Co. Ltd | 1924 | BT31 | 28364 | 195895 | ||
| Mynyddislwyn Collieries Ltd | Pontllanfraith | Monmouthshire | 1900 | BT31 | 9161 | 67891 |
| Myrtle Hill Craig y Dinas Colliery Co. Ltd | 1900 | BT31 | 16339 | 64981 | ||
| N.C. Thorncliffe Collieries Ltd | Rotherham | Yorkshire | 1945 | BT31 | 36984 | 396013 |
| N.H. & B. Collieries Ltd | Sutton in Ashfield | Nottinghamshire | 1944 | BT31 | 37398 | 391134 |
| Nailsea Coal & Coke Co. Ltd | Somersetshire | Somersetshire | 1874 | BT31 | 2009 | 8667 |
| Nailsea Heath Coal Co. Ltd | 1866 | BT31 | 1266 | 3102 | ||
| Nailstone Colliery Co. Ltd | 1871 | BT31 | 1631 | 5576 | ||
| Nant Coal Co. Ltd | 1860 | BT31 | 523 | 2096 | ||
| Nant Hir Colliery Co. Ltd | 1875 | BT31 | 2166 | 10096 | ||
| Nant Mawr Colliery Co. Ltd | 1858 | BT31 | 377 | 1388 | ||
| Nantclwydd Hall Lime & Coal Co. Ltd | 1867 | BT31 | 1350 | 3624 | ||
| Nantdyrus Colliery Co. Ltd | 1915 | BT31 | 22822 | 140237 | ||
| Nantgwyn Anthracite Colliery (1927) Ltd | 1927 | BT31 | 32799 | 218758 | ||
| Nantgwyn Anthracite Colliery Ltd | 1924 | BT31 | 28491 | 197597 | ||
| Nantmelin Colliery Co. Ltd | Aberdare | Glamorganshire | 1883 | BT31 | 3206 | 18674 |
| Nantyglo Elled & Steam Coal Collieries Ltd | 1896 | BT31 | 6705 | 47128 | ||
| Narberth Gas Coke & Coal Co. Ltd | 1904 | BT31 | 10768 | 81635 | ||
| Nash & Sprinkle Anthracite Colliery Co. Ltd | 1858 | BT31 | 356 | 1299 | ||
| Natal Coal Fields Ltd | 1902 | BT31 | 31857 | 73007 | ||
| Natal Coal Trust Ltd | 1903 | BT31 | 10295 | 77340 | ||
| Natal Coal Trust Ltd | 1903 | BT31 | 10230 | 76768 | ||
| Natal Collieries & Durban Coaling Station Ltd | 1896 | BT31 | 6853 | 48213 | ||
| Natal Collieries Syndicate Ltd | 1903 | BT31 | 10415 | 78468 | ||
| Natal Merthyr Collieries Ltd | 1901 | BT31 | 9481 | 70423 | ||
| Natal Oceanic Collieries Ltd | 1900 | BT31 | 9303 | 69159 | ||
| Natal Steam Coal Co. Ltd | 1897 | BT31 | 15835 | 53981 | ||
| Natal Victoria Navigation Collieries Ltd | 1902 | BT31 | 9753 | 72650 | ||
| National Association of Colliery Managers | 1889 | BT31 | 14965 | 28247 | ||
| National Coal Co. Ltd | 1887 | BT31 | 3864 | 24370 | ||
| National Coal Co. Ltd | 1866 | BT31 | 1207 | 2745C | ||
| National Coal Saving & Smoke Abolition Syndicate Ltd (1895) | 1896 | BT31 | 6601 | 46432 | ||
| National Collieries Development Co. Ltd | 1910 | BT31 | 19212 | 107362 | ||
| National Excursion Steamship Colliery & Salvage Co. Ltd | 1881 | BT31 | 2875 | 15889 | ||
| National Fuel & Coal Exporters Ltd | 1920 | BT31 | 26135 | 169690 | ||
| National Industrial Coal Society Ltd | 1877 | BT31 | 2311 | 11190 | ||
| National Steam Coal Co. Ltd | 1883 | BT31 | 3250 | 19087 | ||
| Naval Collieries (1931) Ltd | 1931 | BT31 | 33239 | 254331 | ||
| Naval Colliery Co. (1897) Ltd | Penygraig | Glamorganshire | 1897 | BT31 | 31802 | 54797 |
| Naval Colliery Co. Ltd | Penygraig | Glamorganshire | 1888 | BT31 | 4020 | 25609 |
| Navarra Coal & Iron Mines (Mines De Charbon et de Fer de La Navarre) Ltd | 1900 | BT31 | 9105 | 67409 | ||
| Navarra Coal & Iron Mines (Mines De Charbon et de Fer de La Navarre) Ltd | Shortwood | Gloucestershire | 1900 | BT31 | 9105 | 67409 |
| Naworth Coal Co. Ltd | Midgeholme | Cumberland | 1909 | BT31 | 18865 | 103204 |
| Neath & Pelenna Colliery Co. Ltd | 1863 | BT31 | 793 | 496C | ||
| Neath Abbey & Dyffryn Estates Colliery Co. Ltd | 1884 | BT31 | 3352 | 19964 | ||
| Neath Coal & Brick Co. Ltd | 1881 | BT31 | 2805 | 15367 | ||
| Neath Collieries Ltd | 1874 | BT31 | 1978 | 8445 | ||
| Neath Merthyr Colliery Co. Ltd | 1901 | BT31 | 9337 | 69374 | ||
| Neath Merthyr Colliery Ltd | 1905 | BT31 | 17485 | 85009 | ||
| Neath Merthyr Steam Colliery Co. Ltd | 1866 | BT31 | 1266 | 3101 | ||
| Nelly Colliery Brick & Tile Co. Ltd | 1894 | BT31 | 5803 | 40701 | ||
| Nelson Colliery Co. Ltd | 1884 | BT31 | 3399 | 20376 | ||
| Nelson’s Coal Conveyor Ltd | 1913 | BT31 | 14155 | 130756 | ||
| Nerbudda Coal & Iron Co. Ltd | 1860 | BT31 | 464 | 1788 | ||
| Nerquis Colliery Co. Ltd | Nercwys | Flintshire | 1919 | BT31 | 24836 | 157152 |
| Neston Colliery Co. Ltd | Little Neston | Lancashire | 1874 | BT31 | 2021 | 8751 |
| Nethandale Colliery Co. Ltd | nd | BT2 | 3535 | |||
| Netherseal Colliery Co. Ltd (1869) | 1870 | BT31 | 1504 | 4677 | ||
| Netherton Coal Co. Ltd | Bedlington | Northumberland | 1901 | BT31 | 36622 | 71861 |
| New Bagworth Coal Co. Ltd | Leicestershire | 1882 | BT31 | 37024 | 16766 | |
| New Bilson, Crump Meadow, Foxes Bridge & Central Collieries Ltd | 1876 | BT31 | 2288 | 11018 | ||
| New Blaengarw Colliery Co. Ltd | 1900 | BT31 | 8877 | 65321 | ||
| New Bowson Deep Coal Co. Ltd | 1868 | BT31 | 1408 | 4035 | ||
| New Braichycymmer Collieries (1910) Ltd | 1910 | BT31 | 32041 | 107207 | ||
| New Brampton Colliery Co. Ltd | 1863 | BT31 | 817 | 622C | ||
| New Brancepeth Colliery Co. Ltd | New Brancepeth | Durham | 1889 | BT31 | 36594 | 30503 |
| New Brook Colliery Co. Ltd | 1923 | BT31 | 28128 | 192869 | ||
| New Broughton Colliery Co. Ltd | Wrexham | Denbighshire | 1898 | BT31 | 8206 | 59423 |
| New Brunswick Cannel Coal Co. Ltd | 1868 | BT31 | 1399 | 3971 | ||
| New Bryncethin Colliery Co. Ltd | Bryncethin | Glamorganshire | 1910 | BT31 | 19218 | 107425 |
| New Butterknowle Colliery Co. Ltd | 1907 | BT31 | 11991 | 93572 | ||
| New Cae Newydd Colliery Ltd | 1924 | BT31 | 28516 | 197950 | ||
| New Caepontbren Colliery Co. Ltd | 1909 | BT31 | 18960 | 104451 | ||
| New Cannock & Wimblebury Colliery Co. Ltd | 1881 | BT31 | 2801 | 15335 | ||
| New Cassell Coal & Exploration Co. of South Africa Ltd | 1895 | BT31 | 6346 | 44830 | ||
| New Clydach Colliery Co. Ltd | Waenavon | Breconshire | 1885 | BT31 | 3573 | 21896 |
| New Coal Brick Syndicate Ltd | 1894 | BT31 | 5921 | 41648 | ||
| New Connah’s Quay Chemical Coal Co. Ltd | 1874 | BT31 | 1960 | 8287 | ||
| New Copley Collieries Ltd | Cockley | Durham | 1913 | BT31 | 21286 | 127604 |
| New Corrwg Fechan Coal Co. Ltd | 1886 | BT31 | 3778 | 23592 | ||
| New Coton Park & Linton Colliery Co. Ltd | 1897 | BT31 | 7596 | 54209 | ||
| New Cross Hands Collieries Ltd | Cross Hands | Carmarthenshire | 1899 | BT31 | 16151 | 60997 |
| New Crow Orchard Colliery Co. Ltd | 1886 | BT31 | 3594 | 22082 | ||
| New Cwmgorse Colliery Co. Ltd | Gwaun-Cae-Gurwen | Glamorganshire | 1900 | BT31 | 16442 | 66747 |
| New Dale Colliery Co. Ltd | Rotherham | Yorkshire | 1897 | BT31 | 7473 | 53192 |
| New Diamond Colliery Co. Ltd | Ystradgynlais | Breconshire | 1911 | BT31 | 20248 | 118062 |
| New Dronfield Silkstone Coal Co. Ltd | 1881 | BT31 | 2816 | 15438 | ||
| New Drym Anthracite Collieries Ltd | 1900 | BT31 | 9288 | 69040 | ||
| New Dynant Anthracite Colliery (1914) Ltd | Cwmmawr | Carmarthenshire | 1914 | BT31 | 32182 | 135439 |
| New Dynant Anthracite Colliery Ltd | Cwmmawr | Carmarthenshire | 1907 | BT31 | 12168 | 95472 |
| New Ffosfach Colliery Co. Ltd | 1914 | BT31 | 22480 | 137373 | ||
| New Flint Coal & Cannel Co. Ltd | 1889 | BT31 | 4529 | 29627 | ||
| New Flint Colliery Co. Ltd | 1899 | BT31 | 8385 | 60970 | ||
| New Froghall Hay House Hydrate Iron & Coal Co. Ltd | 1887 | BT31 | 3823 | 24013 | ||
| New Glenduffhill Coal Co. Ltd | 1881-1886 | BT2 | 1048 | |||
| New Glynea Colliery Co. Ltd | Bynea | Carmarthenshire | 1916 | BT31 | 23306 | 144121 |
| New Gored Merthyr Collieries Ltd | Resolven | Glamorganshire | 1908 | BT31 | 18371 | 97063 |
| New Gorsllan Colliery Co. Ltd | 1928 | BT31 | 32935 | 230151 | ||
| New Gorwydd Colliery Co. Ltd | 1909 | BT31 | 12737 | 102418 | ||
| New Grosvenor Colliery Co. Ltd | 1880 | BT31 | 2618 | 13836 | ||
| New Haden Collieries Ltd | Cheadle | Staffordshire | 1910 | BT31 | 19609 | 111200 |
| New Hanley & Bucknall Colliery Co. Ltd | Stoke-on-Trent | Staffordshire | 1874 | BT31 | 1963 | 8315 |
| New Harperley Collieries Ltd | 1927 | BT31 | 29861 | 222296 | ||
| New Heather Colliery Ltd | 1892 | BT31 | 5389 | 37085 | ||
| New Hemsworth Colliery Co. Ltd | Hemsworth | Yorkshire | 1890 | BT31 | 4817 | 31940 |
| New Hendreforgan (1919) Colliery Co. Ltd | 1919 | BT31 | 24323 | 152533 | ||
| New Hucknall Colliery Co. Ltd | Hucknall | Nottinghamshire | 1879 | BT31 | 2561 | 13360 |
| New Hucknall Colliery Co. Ltd | Hucknall | Nottinghamshire | 1900 | BT31 | 37222 | 68414 |
| New Ingleton Collieries Ltd | Ingleton | Yorkshire | 1909 | BT31 | 34907 | 105532 |
| New Kilburn Colliery Co. Ltd | Horsley | Derbyshire | 1920 | BT31 | 32420 | 166882 |
| New Leeswood Collieries Ltd | 1890 | BT31 | 4893 | 32541 | ||
| New Leeswood Main Colliery Co. Ltd | Mold | Flintshire | 1874 | BT31 | 2056 | 9050 |
| New Limehurst Colliery Co. Ltd | Ashton-under-Lyne | Lancashire | 1892 | BT31 | 5320 | 36417 |
| New Llantwit Coal Co. Ltd | Llantrisant | Glamorganshire | 1884 | BT31 | 3401 | 20396 |
| New Mells Colliery Co. Ltd | Somersetshire | Somersetshire | 1937 | BT31 | 37341 | 330486 |
| New Moss Colliery Ltd | Audenshaw | Lancashire | 1895 | BT31 | 31791 | 43879 |
| New North Leeswood Collieries Ltd | Mold | Flintshire | 1890 | BT31 | 4922 | 32787 |
| New North Staffordshire Coal & Iron Co. Ltd | Newcastle-under-Lyne | Staffordshire | 1872 | BT31 | 1744 | 6456 |
| New Oceana Transvaal Coal Co. Ltd | 1899 | BT31 | 8794 | 64468 | ||
| New Park Colliery Co. Ltd | 1913 | BT31 | 14122 | 129453 | ||
| New People’s Coal Co. Ltd | 1874 | BT31 | 2042 | 8896 | ||
| New Pool Colliery Co. Ltd | 1910 | BT31 | 19612 | 111217 | ||
| New Regulator Colliery Co. Ltd | 1925 | BT31 | 29364 | 210789 | ||
| New Reynolton Anthracite Colliery Co. Ltd | Pembrokeshire | 1913 | BT31 | 21832 | 132153 | |
| New Rhondda Collieries Ltd | 1913 | BT31 | 14043 | 126319 | ||
| New Rhos Anthracite Collieries Ltd | 1922 | BT31 | 27632 | 186415 | ||
| New Rhos Anthracite Collieries Ltd | 1927 | BT31 | 32879 | 225905 | ||
| New Road Colliery Co. Ltd | 1874 | BT31 | 2046 | 8938 | ||
| New Rockwood Colliery Ltd | Taff’s Well | Glamorganshire | 1937 | BT31 | 37339 | 328539 |
| New Roundwood Colliery Co. Ltd | 1897 | BT31 | 7486 | 53272 | ||
| New Russian Colliery Syndicate Ltd | 1900 | BT31 | 9078 | 67193 | ||
| New Sharlston Collieries Co. Ltd | Sharlston | Yorkshire | 1874 | BT31 | 37016 | 7737 |
| New Silkstone & Haigh Moor Coal Co. Ltd | Barnsley | Yorkshire | 1902 | BT31 | 31867 | 74444 |
| New Silkstone Colliery Co. Ltd | Barnsley | Yorkshire | 1875 | BT31 | 2104 | 9512 |
| New Skegby Colliery Co. Ltd | 1882 | BT31 | 3039 | 17223 | ||
| New Skewen Wern Avon Collieries Ltd | 1919 | BT31 | 24748 | 156315 | ||
| New South Wales Collieries Co. Ltd | 1874 | BT31 | 1931 | 7990 | ||
| New South Wales Colliery Co. Ltd | 1887 | BT31 | 3941 | 24982 | ||
| New Speedwell Colliery Co. Ltd | Berry Hill | Gloucestershire | 1925 | BT31 | 29009 | 205102 |
| New Swannington Colliery Co. Ltd | 1895 | BT31 | 6199 | 43934 | ||
| New Temple Normanton Coal & Coke Co. Ltd | Temple Normanton | Derbyshire | 1879 | BT31 | 2563 | 13377 |
| New Trafalgar Colliery Ltd | Drybrook | Gloucestershire | 1923 | BT31 | 28235 | 194152 |
| New Vancouver Coal Mining & Land Co. Ltd | 1889 | BT31 | 4333 | 28146 | ||
| New Victoria Colliery Co. Ltd | 1884 | BT31 | 3306 | 19536 | ||
| New Wallsend Colliery Co. Ltd | 1878 | BT31 | 2434 | 12335 | ||
| New Wallsend Main Colliery Co. Ltd | Barnsley | Yorkshire | 1905 | BT31 | 11232 | 85794 |
| New Wernpistile Colliery & Fire Brick Co. Ltd | Briton Ferry | Glamorganshire | 1875 | BT31 | 2162 | 10066 |
| New Wharncliffe Coal Co. Ltd | 1894 | BT31 | 5793 | 40618 | ||
| New Woolley Moor Colliery Co. Ltd | 1905 | BT31 | 11352 | 86955 | ||
| New Ystradowen Colliery Co. Ltd | Upper Cwmtwrch | Carmarthenshire | 1908 | BT31 | 12527 | 99745 |
| New Zealand Collieries Railway & Oil Syndicate Ltd | 1898 | BT31 | 7801 | 55794 | ||
| New Zealand Land & Coal Co. Ltd | New Zealand | 1872 | BT31 | 1732 | 6371 | |
| New Zealand Land & Coal Co. Ltd | New Zealand | 1873 | BT31 | 1820 | 7045 | |
| Newark Upon Trent & District Coal & Coke Co. Ltd | 1865 | BT31 | 1188 | 2619C | ||
| Newark Upon Trent Coal & Coke Supply Association Ltd | 1873 | BT31 | 1846 | 7232 | ||
| Newbiggin Colliery Co. Ltd | Newbiggin by the Sea | Northumberland | 1907 | BT31 | 36652 | 94834 |
| Newbold Colliery Co. Ltd | 1914 | BT31 | 22097 | 134266 | ||
| Newbridge Engine Colliery Co. Ltd | 1875 | BT31 | 2127 | 9738 | ||
| Newbridge Rhondda Collieries Co. Ltd | 1874 | BT31 | 2004 | 8624 | ||
| Newbury Collieries Co. Ltd | 1909 | BT31 | 12991 | 106028 | ||
| Newbury Collieries Ltd | Somersetshire | Somersetshire | 1916 | BT31 | 23355 | 144497 |
| Newcastle (Natal) Collieries & Estate Co. Ltd | 1890 | BT31 | 4723 | 31171 | ||
| Newcastle (Natal) Steam Coal Collieries Ltd | 1903 | BT31 | 10207 | 76553 | ||
| Newcastle (Natal) Steam Coal Collieries Ltd | 1903 | BT31 | 10207 | 76553 | ||
| Newdigate Colliery Ltd | Nuneaton | Worcestershire | 1904 | BT31 | 17232 | 80881 |
| Newent Coal & Iron Co. Ltd | Newent | Gloucestershire | 1877 | BT31 | 2389 | 11879 |
| Newent Colliery Co. Ltd | 1876 | BT31 | 2234 | 10599 | ||
| Newfields Colliery Ltd | 1924 | BT31 | 28592 | 199091 | ||
| Newhall Field Colliery Co. Ltd | 1885 | BT31 | 3470 | 21012 | ||
| Newhaven Coal Supply Co. Ltd | 1923 | BT31 | 27804 | 188661 | ||
| Newhill & Milton Main Coal Co. Ltd | 1877 | BT31 | 2376 | 11763 | ||
| Newhouse Colliery Ltd | nd | BT2 | 3549 | |||
| Newmarket Collieries Brick Works & Pottery Co. Ltd | Wakefield | Yorkshire | 1879 | BT31 | 2489 | 12790 |
| Newmarket Haigh Moor Colliery Ltd | Wakefield | Yorkshire | 1898 | BT31 | 8065 | 58141 |
| Newport & Isle of Wight Coal Co. Ltd | 1873 | BT31 | 1827 | 7095 | ||
| Newport (Oregon) Coal Co. Ltd | 1872 | BT31 | 1752 | 6525 | ||
| Newport Abercarn Black Vein Steam Coal Co. Ltd | 1873 | BT31 | 33756 | 7013 | ||
| Newport Coal & Coke Co. Ltd | 1897 | BT31 | 31567 | 54464 | ||
| Newsham Colliery Co. Ltd | Winston | Durham | 1909 | BT31 | 18865 | 103205 |
| Newstead Colliery Co. Ltd | 1878 | BT31 | 14598 | 12225 | ||
| Newstead Colliery Co. Ltd | Newstead | Nottinghamshire | 1919 | BT31 | 38356 | 161729 |
| Newthorpe Collieries Ltd | 1913 | BT31 | 21762 | 131573 | ||
| Newton Coal & Lime Co. Ltd | 1892 | BT31 | 5439 | 37568 | ||
| Newton Colliery Ltd | Newton on the Moor | Northumberland | 1902 | BT31 | 10057 | 75228 |
| Niddrie & Benhar Coal Co. Ltd | 1882 | BT2 | 1146 | |||
| Nine Wells Colliery Co. Ltd | Blakeney | Gloucestershire | 1923 | BT31 | 28113 | 192680 |
| Ninety-Nine Percent Efficiency Gas (Coal & Oil) Systems Ltd | 1920 | BT31 | 26204 | 170426 | ||
| No.2 Peat Coal Syndicate Ltd | 1905 | BT31 | 11154 | 85063 | ||
| Normanby Coal Syndicate Ltd | 1906 | BT31 | 11743 | 91038 | ||
| North & South Buckley Colliery Brick & Tile Co. Ltd | 1881 | BT31 | 2848 | 15666 | ||
| North & South Wales Coal & Lime Co. Ltd | 1862 | BT31 | 634 | 2657 | ||
| North Amman Collieries Ltd | Garnant | Carmarthenshire | 1913 | BT31 | 21281 | 127554 |
| North Ayrshire Coal & Oil Co. Ltd | Ayrshire | 1916 | BT31 | 23128 | 142755 | |
| North Bitchburn Coal Co. Ltd | Evenwood | Durham | 1903 | BT31 | 31879 | 76396 |
| North Bitchburn Coal Co. Ltd | Evenwood | Durham | 1890 | BT31 | 4811 | 31892 |
| North Brancepeth Coal Co. Ltd | Durham | Durham | 1870 | BT31 | 30794 | 5022 |
| North Brunner Coal Co. Ltd | 1908 | BT31 | 12335 | 97392 | ||
| North Buckley Colliery & Fire Brick Co. Ltd | 1875 | BT31 | 2131 | 9771 | ||
| North End Colliery (Cockfield) Ltd | Cockfield | Durham | 1918 | BT31 | 24140 | 151107 |
| North End Colliery Co. (1920) Ltd | Tonmawr | Northumberland | 1920 | BT31 | 26090 | 169243 |
| North End Colliery Co. (1928) Ltd (The) | Tonmawr | Northumberland | 1928 | BT31 | 30273 | 232242 |
| North End Colliery Co. Ltd | Tonmawr | Northumberland | 1914 | BT31 | 22200 | 135144 |
| North German (Sehnde) Coal Co. Ltd | 1870 | BT31 | 1555 | 5013 | ||
| North Llantwit Colliery Co. Ltd | 1900 | BT31 | 8933 | 65878 | ||
| North Metropolitan Coal Co. Ltd | 1866 | BT31 | 1308 | 3355 | ||
| North Notts Coal Supplies Ltd | 1927 | BT31 | 29820 | 221273 | ||
| North of England Coal Owner’s Mutual Protection Association | 1880 | BT31 | 2732 | 14803 | ||
| North of England United Coal Trade Association | 1887 | BT31 | 35852 | 24099 | ||
| North of Spain Collieries Ltd | 1912 | BT31 | 20955 | 124570 | ||
| North Pacific (Koskeemo Sound Vancouver Island) Coal & Land Co. Ltd | 1871 | BT31 | 1618 | 5492 | ||
| North Pacific (Koskeemo Sound Vancouver Island) Coal & Land Co. Ltd | British Columbia | Canada | 1871 | BT31 | 1618 | 5492 |
| North Rhondda Colliery Co. Ltd | Glyncorrwg | Glamorganshire | 1908 | BT31 | 37253 | 98333 |
| North Sea Coaling Co. Ltd | 1910 | BT31 | 19285 | 108014 | ||
| North Stafford Steel Iron & Coal Co. (Burslem) Ltd | 1864 | BT31 | 882 | 925C | ||
| North Staffordshire Coal & Iron Co. Ltd | 1857 | BT31 | 261 | 865 | ||
| North Staffordshire Collieries Mutual Indemnity Ltd (The) | 1934 | BT31 | 36701 | 288304 | ||
| North Stockton Coal Co. Ltd | 1888 | BT31 | 4180 | 27022 | ||
| North Sydney Coal Co. Ltd | 1889 | BT31 | 4454 | 29024 | ||
| North Wales Cannel Collieries Ltd | 1895 | BT31 | 6306 | 44624 | ||
| North Wales Coal Co. Ltd | Flintshire | 1909 | BT31 | 12679 | 101732 | |
| North Wales Coal Iron & Fire Brick Co. Ltd | 1866 | BT31 | 1255 | 3032 | ||
| North Wales Coal Oil Co. Ltd | Mold | Flintshire | 1865 | BT31 | 1069 | 1935C |
| North Wales Collieries Co. Ltd | 1875 | BT31 | 2165 | 10085 | ||
| North Western Coal & Navigation Co. Ltd | 1882 | BT31 | 2974 | 16713 | ||
| North Western United Collieries & Cannel Co. Ltd | 1891 | BT31 | 4980 | 33294 | ||
| North Wingfield Colliery Co. Ltd | North Wingfield | Derbyshire | 1915 | BT31 | 22923 | 141105 |
| North Wingfield Colliery Co. Ltd | 1875 | BT31 | 2121 | 9694 | ||
| North Wylam Colliery Co. Ltd | Wylam | Northumberland | 1913 | BT31 | 32170 | 132169 |
| North Yate Colliery Co. Ltd | 1876 | BT31 | 2296 | 11072 | ||
| North Zambesi Coal Syndicate Ltd | 1905 | BT31 | 37670 | 86847 | ||
| Northampton Coal Iron & Wagon Co. Ltd | 1872 | BT31 | 1764 | 6611 | ||
| Northern Coal & Bye Products Co. Ltd | 1920 | BT31 | 26011 | 168418 | ||
| Northern Coal & Iron Co. Ltd | 1921 | BT31 | 26802 | 177057 | ||
| Northern Coal Supplies (Liverpool) Ltd | 1926 | BT31 | 29704 | 218392 | ||
| Northern Rhodesia Coal Syndicate Ltd | 1899 | BT31 | 8465 | 61610 | ||
| Northfleet Coal & Ballast Co. Ltd | 1868 | BT31 | 31746 | 4026 | ||
| Northop Hall & Dublin Coal Co. Ltd | 1860 | BT31 | 469 | 1814 | ||
| North’s Navigation Collieries Syndicate Ltd | Glamorganshire | 1888 | BT31 | 4191 | 27108 | |
| Northumberland Land & Coal Co. Ltd | Northumberland | 1886 | BT31 | 3769 | 23519 | |
| Northwood Colliery Co. Ltd | 1865 | BT31 | 1202 | 2709C | ||
| Norton Cannock Coal Co. Ltd | 1877 | BT31 | 2361 | 11627 | ||
| Norton Cannock Colliery Co. Ltd | Newtown | Staffordshire | 1874 | BT31 | 2041 | 8886 |
| Norton Green Coal Co. Ltd | 1874 | BT31 | 2023 | 8767 | ||
| Norton Thorpe Colliery Co. Ltd | Yorkshire | 1909 | BT31 | 12897 | 104720 | |
| Norwich Coal Co. Ltd | 1890 | BT31 | 4710 | 31051 | ||
| Norwood Green Coal Co. Ltd | Wyke | Yorkshire | 1873 | BT31 | 1832 | 7138 |
| Nostell Colliery Ltd | Nostell | Yorkshire | 1918 | BT31 | 38338 | 150414 |
| Nottingham District Coal Sales Association Ltd (The) | 1936 | BT31 | 35692 | 318707 | ||
| Nottinghamshire Collieries Medical Service Association Ltd | 1928 | BT31 | 35435 | 229288 | ||
| Nottinghamshire Main Colliery Co. Ltd | Nottinghamshire | Nottinghamshire | 1917 | BT31 | 23748 | 147861 |
| Nova Scotia Collieries Ltd | 1903 | BT31 | 17022 | 77305 | ||
| Nucetto Bagnasco Coal Co. Ltd | 1890 | BT31 | 4673 | 30745 | ||
| Nunnery Colliery Co. Ltd | Sheffield | Yorkshire | 1874 | BT31 | 37019 | 8781 |
