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Company Name |
Location |
Area |
Year |
Class |
Box No |
Company No |
| Taff Coal Co. Ltd | 1888 | BT31 | 4072 | 26063 | ||
| Taff Llantwit Colliery Co. Ltd | Llantwit Fardre | Glamorganshire | 1892 | BT31 | 5368 | 36861 |
| Taff Rhondda Navigation Steam Coal Co. Ltd | 1920 | BT31 | 25922 | 167473 | ||
| Taff Vale Coal & Coke Co. Ltd | 1866 | BT31 | 1296 | 3297 | ||
| Takoradi Coaling & Lighterage Co. Ltd | 1926 | BT31 | 32790 | 217840 | ||
| Talana (Natal) Collieries Ltd | 1904 | BT31 | 10739 | 81411 | ||
| Talana Collieries Ltd | 1910 | BT31 | 13370 | 111576 | ||
| Talbot Merthyr Colliery Ltd | 1905 | BT31 | 11083 | 84338 | ||
| Talk O’Th Hill Colliery Ltd | Stoke-on-Trent | Staffordshire | 1885 | BT31 | 14806 | 21584 |
| Talyclyn Colliery & Fire Brick Co. Ltd | Pontarddulais | Carmarthenshire | 1885 | BT31 | 3550 | 21699 |
| Talyfan Colliery Co. Ltd | 1905 | BT31 | 11053 | 84043 | ||
| Tamar Coal Manure & General Mercantile Co. Ltd | 1859 | BT31 | 383 | 1418 | ||
| Tamel Coal Co. Ltd | 1908 | BT31 | 18375 | 97118 | ||
| Tamworth Colliery Co. Ltd | Tamworth | Worcestershire | 1899 | BT31 | 31722 | 63032 |
| Tanat Valley Coal & Lime Co. Ltd | 1904 | BT31 | 17173 | 79819 | ||
| Tanybryn Colliery & Brick Works Co. Ltd | Aberdare | Glamorganshire | 1905 | BT31 | 11295 | 86400 |
| Tapton Colliery, Coke & Iron Co. Ltd | Chesterfield | Derbyshire | 1865 | BT31 | 1061 | 1896C |
| Tavistock Cash Coals Ltd | 1925 | BT31 | 28994 | 204858 | ||
| Tavistock Gas Coke & Coal Co. Ltd | 1857 | BT31 | 223 | 706 | ||
| Tavistock Joint Stock Coal Co. | 1856 | BT31 | 145 | 454 | ||
| Tavistock Lighting Coal & Coke Co. Ltd | 1904 | BT31 | 34760 | 80777 | ||
| Tavistock Lighting Coal & Coke Co. Ltd | 1904 | BT31 | 34759 | 80777 | ||
| Tawd Vale Colliery Co. Ltd | Skelmersdale | Lancashire | 1863 | BT31 | 756 | 318C |
| Tawe Vale Coal Co. Ltd | Pontardawe | Glamorganshire | 1907 | BT31 | 11883 | 92450 |
| Tawe Vale Collieries Co. Ltd | Pontardawe | Glamorganshire | 1918 | BT31 | 24157 | 151247 |
| Taylors’ Coal Depot Ltd | 1910 | BT31 | 19782 | 113323 | ||
| Tchamli Coals Marine & General Co. Ltd | 1914 | BT31 | 21975 | 133292 | ||
| Tees Hetton Coal Co. Ltd | Evenwood | Durham | 1883 | BT31 | 3172 | 18412 |
| Tembuland Coal Iron & Chemical Co. Ltd | 1919 | BT31 | 25084 | 159384 | ||
| Temple Normanton Colliery Co. Ltd | 1890 | BT31 | 4714 | 31093 | ||
| Temple Normanton Colliery Co. Ltd | 1873 | BT31 | 1910 | 7784 | ||
| Ten Coal Iron & Brick Co. Ltd | 1899 | BT31 | 8525 | 62044 | ||
| Teplitz Colliery | 1862 | BT31 | 649 | 2730 | ||
| Teplitz Colliery & Coal Oil Co. Ltd | 1869 | BT31 | 1440 | 4249 | ||
| Terrace Colliery Co. Ltd | 1902 | BT31 | 9939 | 74123 | ||
| Tewgoed Colliery Co. Ltd | 1951 | BT31 | 37891 | 500194 | ||
| Thames Seaborne Coal & Patent Fuel Co. Ltd | 1891 | BT31 | 5193 | 35131 | ||
| Thanet Coal Co. Ltd | 1864 | BT31 | 963 | 1342C | ||
| Thanet Coal Co. Ltd | 1893 | BT31 | 5721 | 40010 | ||
| The Collieries Trustee Co. Ltd | 1904-1984 | BT2 | 1984 | 5667-1 | ||
| The Collieries Trustee Co. Ltd | 1984 | BT2 | 1984 | 5667 | ||
| Thirlwall Coal Co. (1913) Ltd | Haltwhistle | Northumberland | 1913 | BT31 | 21240 | 127209 |
| Thorn & Cresswell Colliery Co. Ltd | 1866 | BT31 | 1210 | 2763C | ||
| Thorncliffe Coal Distillation Ltd | 1920 | BT31 | 36392 | 165991 | ||
| Thorney Gas Coal & Coke Co. Ltd | 1910 | BT31 | 19525 | 110239 | ||
| Thornton (Bradford) Coal Association Ltd | 1902 | BT31 | 16897 | 74994 | ||
| Three Towns Coal Dealers & Consumers’ Association Ltd | 1890 | BT31 | 4930 | 32864 | ||
| Thrislington Coal Co. Ltd | Cornforth | Durham | 1881 | BT31 | 2781 | 15182 |
| Throckley Coal Co. Ltd | Throckley | Northumberland | 1891 | BT31 | 38211 | 34478 |
| Thuile Coal Syndicate Ltd | 1889 | BT31 | 4590 | 30084 | ||
| Tibbington Collieries & Brickworks Ltd | 1874 | BT31 | 14499 | 8593 | ||
| Tickhill Gas Light Coal & Coke Co. Ltd | 1872 | BT31 | 1727 | 6325 | ||
| Tickhill Gas Light Coal & Coke Co. Ltd | 1909 | BT31 | 19022 | 105228 | ||
| Tideswell & Millers Dale Coal & General Merchant Co. Ltd | 1870 | BT31 | 30795 | 5076 | ||
| Tillery Colliery Co. Ltd | 1865 | BT31 | 1191 | 2640C | ||
| Times Coal Co. Ltd | 1866 | BT31 | 1280 | 3199 | ||
| Tingley Collieries Ltd | Tingley | Yorkshire | 1929 | BT31 | 33144 | 244556 |
| Tinsley Park Colliery Co. Ltd | Sheffield | Yorkshire | 1898 | BT31 | 31610 | 57072 |
| Tipton Collieries Ltd | Tipton | Staffordshire | 1911 | BT31 | 13654 | 116705 |
| Tipton Green Colliery Co. Ltd | 1874 | BT31 | 1940 | 8089 | ||
| Tipton Moat Colliery Co. Ltd | 1860 | BT31 | 467 | 1809 | ||
| Tir Pentwys “Black Vein” Steam Coal & Coke Co. Ltd | Pontypool | Monmouthshire | 1889 | BT31 | 37654 | 27805 |
| Tirdonkin Collieries Ltd | Llangyfelach | Glamorganshire | 1895 | BT31 | 15496 | 44446 |
| Tirdonkin Merthyr Collieries Ltd | 1920 | BT31 | 32450 | 170476 | ||
| Tirydail Colliery Co. Ltd | Ammanford | Carmarthenshire | 1898 | BT31 | 7811 | 55885 |
| Titford Colliery Co. Ltd | 1874 | BT31 | 1926 | 7953 | ||
| Tivydale Colliery Ltd | Leeds | Yorkshire | 1924 | BT31 | 28707 | 200520 |
| Togston Coal Co. Ltd | Togston | Northumberland | 1890 | BT31 | 4924 | 32814 |
| Ton Hir Colliery Co. Ltd | Port Talbot | Glamorganshire | 1905 | BT31 | 17463 | 84658 |
| Ton Phillip Rhondda Colliery Co. Ltd | Bridgend | Glamorganshire | 1898 | BT31 | 16070 | 59232 |
| Ton Yr Rhondda Colliery Ltd | 1927 | BT31 | 30067 | 226740 | ||
| Tonbridge Coal & General Supply Association Ltd | 1894 | BT31 | 6017 | 42491 | ||
| Tondu Colliery Co. Ltd | 1892 | BT31 | 5378 | 36963 | ||
| Tongham & District Coal Supply Co. Ltd | 1918 | BT31 | 23962 | 149608 | ||
| Tonmawr Collieries Ltd | 1913 | BT31 | 21192 | 126789 | ||
| Tor y Coed Colliery Co. Ltd | Llantrisant | Glamorganshire | 1900 | BT31 | 8853 | 65088 |
| Torpoint Coal & Gas Co. Ltd | 1856 | BT31 | 188 | 562 | ||
| Torpoint Coal & Gas Co. Ltd | 1905 | BT31 | 34800 | 86642 | ||
| Torquay & South Devon Coal Co. Ltd | 1913 | BT31 | 21799 | 131892 | ||
| Torquay St Mary Church & South Devon Coal Coke & Trading Co. Ltd | 1865 | BT31 | 1092 | 2075C | ||
| Torybanwen Collieries Ltd | 1918 | BT31 | 24060 | 150472 | ||
| Torycoed Colliery Co. Ltd | Llantrisant | Glamorganshire | 1907 | BT31 | 18286 | 95845 |
| Torymynydd Rhondda Colliery Co. Ltd | Cwmavon | Glamorganshire | 1909 | BT31 | 19017 | 105186 |
| Towneley Coal & Fireclay Co. Ltd | Burnley | Lancashire | 1914 | BT31 | 37273 | 134217 |
| Townhill (Dunfermline) Colliery Ltd | 1910 | BT31 | 19790 | 113409 | ||
| Townhill Colliery Co. Ltd | nd | BT2 | 3577 | |||
| Towyn Gas Lighting & Coal & Coke Co. Ltd | 1865 | BT31 | 1157 | 2450C | ||
| Trading & Coaling Co. Ltd | 1919 | BT31 | 24814 | 156963 | ||
| Trafalgar Colliery Co. Ltd | Drybrook | Gloucestershire | 1883 | BT31 | 14755 | 19222 |
| Tranmere Coal Co. Ltd | 1871 | BT31 | 1598 | 5344 | ||
| Transatlantic Steam Coal Co. Ltd | Bridgend | Glamorganshire | 1883 | BT31 | 3160 | 18312 |
| Transvaal & Free State Coal Syndicate Ltd | 1896 | BT31 | 6948 | 48909 | ||
| Transvaal & Natal Collieries Ltd | 1909 | BT31 | 32031 | 104693 | ||
| Transvaal Coal Estates Syndicate Ltd | 1893 | BT31 | 5500 | 38102 | ||
| Tranwell Coal Co. Ltd | 1913 | BT31 | 14082 | 127823 | ||
| Trecastle Coal & Iron Co. Ltd | 1865 | BT31 | 1126 | 2271C | ||
| Tredegar (Southern) Collieries Ltd | Pontllanfraith | Monmouthshire | 1922 | BT31 | 36925 | 186051 |
| Tredegar Associated Collieries & Shipping Co. Ltd | 1919 | BT31 | 36668 | 159995 | ||
| Tredegar Iron & Coal Co. Ltd | Tredegar | Monmouthshire | 1873 | BT31 | 37002-3701 | 7116 |
| Treorky Colliery Co. Ltd | 1913 | BT31 | 14191 | 132172 | ||
| Trimsaran Anthracite Coal & Iron Co. | Trimsaran | Carmarthenshire | 1863 | BT31 | 731 | 186C |
| Trimsaran Coal, Iron & Steel Co. Ltd | Trimsaran | Carmarthenshire | 1872 | BT31 | 1691 | 6058 |
| Trinant Colliery Ltd | 1924 | BT31 | 28543 | 198337 | ||
| Troedyrhiw Coal Co. Ltd | 1919 | BT31 | 32283 | 155081 | ||
| Troglien Colliery Co. Ltd | 1903 | BT31 | 10443 | 78704 | ||
| Tuberao (Brazilian) Coal Mining Co. Ltd | 1882 | BT31 | 3017 | 17054 | ||
| Tuberao (Brazilian) Coal Mining Co. Ltd | 1882 | BT31 | 3017 | 17054 | ||
| Tunbridge Wells Joint Stock Coal & Goods Co. Ltd | 1866 | BT31 | 1267 | 3105 | ||
| Tunstall Coal & Iron Co. Ltd | Stoke-on-Trent | Staffordshire | 1900 | BT31 | 8901 | 65544 |
| Turnbull Coal & Shipping Co. Ltd | 1924 | BT31 | 32629 | 197880 | ||
| Tuscan Coal Mines Ltd | 1901 | BT31 | 9384 | 69701 | ||
| Tuscan Coal Mines Ltd | 1901 | BT31 | 9384 | 69701 | ||
| Twerton Colliery Co. Ltd | 1871 | BT31 | 1626 | 5548 | ||
| Twin Colliery Co. Ltd | 1918 | BT31 | 24066 | 150522 | ||
| Twyn Gwyn Colliery Co. Ltd | 1898 | BT31 | 31806 | 57372 | ||
| Ty Picca Colliery Co. Ltd | 1874 | BT31 | 2042 | 8895 | ||
| Tygwyn Anthracite Colliery Co. Ltd | 1923 | BT31 | 28004 | 191279 | ||
| Tyla Coch Steam Colliery Co. Ltd | 1876 | BT31 | 2239 | 10630 | ||
| Tylcha Wen Colliery Co. Ltd | 1865 | BT31 | 1196 | 2673C | ||
| Tyldesley Coal Co. Ltd | Tyldesley | Lancashire | 1870 | BT31 | 36739 | 5136 |
| Tyle Colliery Co. Ltd | 1921 | BT31 | 26912 | 178274 | ||
| Tyllwyd & Dynevor Colliery Co. Ltd | 1880 | BT31 | 2685 | 14399 | ||
| Tyllwyd Colliery Co. Ltd | 1906 | BT31 | 11508 | 88677 | ||
| Tymawr Rhondda Colliery Co. Ltd | 1881 | BT31 | 2836 | 15594 | ||
| Tyn Twll Colliery Ltd | 1893 | BT31 | 5541 | 38524 | ||
| Tyne Coal Cutter Ltd | 1895 | BT31 | 6225 | 43124 | ||
| Tyne Coal Hulk Co. Ltd | 1899 | BT31 | 16214 | 62438 | ||
| Tyne Valley Colliery Ltd | 1894 | BT31 | 6029 | 42604 | ||
| Tynedale Coal Co. Ltd | Acomb | Northumberland | 1904 | BT31 | 17164 | 79653 |
| Tynyfron Colliery Co. Ltd | 1909 | BT31 | 18670 | 100953 | ||
| Tynygraig Colliery Co. Ltd | Glynogwr | Glamorganshire | 1916 | BT31 | 23415 | 144943 |
| Uni Coal Syndicate Ltd | 1922 | BT31 | 27565 | 185627 | ||
| Union Coal & Iron Co. Ltd | 1867 | BT31 | 1369 | 3760 | ||
| United African Collieries Ltd | 1895 | BT31 | 6419 | 45317 | ||
| United Anthracite Collieries Ltd | Ammanford | Glamorganshire | 1923 | BT31 | 28065 | 192126 |
| United Anthracite Collieries Ltd | Ammanford | Glamorganshire | 1927 | BT31 | 32879 | 225912 |
| United Bituminous Collieries Co. Ltd | 1872 | BT31 | 1690 | 6044 | ||
| United Canal Coal Co. Ltd | 1866 | BT31 | 1265 | 3095 | ||
| United Canal Coal Lime & Building Materials Co. Ltd | 1882 | BT31 | 3068 | 17485 | ||
| United Cannel Collieries Ltd | 1894 | BT31 | 5952 | 41931 | ||
| United Carpontbren Collieries Ltd | 1908 | BT31 | 12296 | 96941 | ||
| United Coal Fields of British Columbia Ltd | 1900 | BT31 | 9083 | 67238 | ||
| United Coals (Cardiff) Ltd | 1923 | BT31 | 27878 | 189602 | ||
| United Collieries & Coal Trading Co. Ltd | 1881 | BT31 | 2838 | 15601 | ||
| United Collieries Ltd | 1874 | BT31 | 1933 | 8011 | ||
| United Collieries Ltd | nd | BT2 | 3794 | |||
| United Knots Coal Co. Ltd | 1870 | BT31 | 1569 | 5118 | ||
| United Merthyr Collieries Co. Ltd | Aberdare | Glamorganshire | 1864 | BT31 | 902 | 1020C |
| United Parkend & New Fancy Collieries Ltd | 1881 | BT31 | 2899 | 16104 | ||
| United Service Coal Co. Ltd | 1926 | BT31 | 29448 | 212620 | ||
| United States Exploration Mineral Coal & Land Syndicate Ltd | 1890 | BT31 | 4774 | 31587 | ||
| United Westminster & Wrexham Collieries Ltd | Wrexham | Denbighshire | 1905 | BT31 | 37495 | 85251 |
| Universal Steam Coal Co. Ltd | Senghenydd | Glamorganshire | 1889 | BT31 | 4638 | 30471 |
| Unstone Coal & Coke Co. Ltd | Unstone | Derbyshire | 1868 | BT31 | 1439 | 4246 |
| Unstone Colliery Co. Ltd | Unstone | Derbyshire | 1911 | BT31 | 19804 | 113549 |
| Unstone Main Colliery Co. Ltd | 1896 | BT31 | 6631 | 46652 | ||
| Upper Elbe Colliery Co. Ltd | 1868 | BT31 | 1384 | 3865 | ||
| Upton Colliery Co. Ltd | Upton | Yorkshire | 1923 | BT31 | 32605 | 193934 |
| Vaalbank (Transvaal) Colliery Ltd | 1917 | BT31 | 23811 | 148383 | ||
| Vagliano Anthracite Collieries Ltd | 1908 | BT31 | 18602 | 100192 | ||
| Vale of Neath Colliery Co. Ltd | Glyn Neath | Glamorganshire | 1920 | BT31 | 32453 | 170855 |
| Vale of Neath Colliery Co. Ltd | Neath | Glamorganshire | 1871 | BT31 | 1605 | 5400 |
| Van Colliery Co. Ltd | 1867 | BT31 | 1327 | 3473 | ||
| Vancouver Coal Mining & Land | 1862 | BT31 | 661 | 2789 | ||
| Vancouver Coal Mining & Land | British Columbia | Canada | 1862 | BT31 | 661 | 2789 |
| Vandegrift Coal Distillation Ltd | 1929 | BT31 | 33042 | 236420 | ||
| Var Oil & Coal Co. Ltd | 1919 | BT31 | 25647 | 164679 | ||
| Varteg Anthracite Collieries Ltd | Ystalyfera | Carmarthenshire | 1923 | BT31 | 28090 | 192407 |
| Varteg Colliery Co. Ltd | 1900 | BT31 | 9218 | 68399 | ||
| Varteg Deep Black Vein Collieries Ltd | Talywain | Monmouthshire | 1901 | BT31 | 16655 | 70424 |
| Vauxhall Colliery Co. Ltd | Ruabon | Denbighshire | 1871 | BT31 | 14424 | 5486 |
| Vectus Coal Co. Ltd | 1920 | BT31 | 25622 | 164371 | ||
| Velinfran Colliery Co. Ltd | Llansamlet | Glamorganshire | 1892 | BT31 | 5340 | 36599 |
| Venallt Steam Coal Co. Ltd | Cwmgwrach | Glamorganshire | 1864 | BT31 | 899 | 1011C |
| Venus Colliery Co. Ltd | Parkend | Gloucestershire | 1895 | BT31 | 6200 | 43944 |
| Victoria & Fenton Park Colliery Co. Ltd | Stoke-on-Trent | Staffordshire | 1873 | BT31 | 1829 | 7109 |
| Victoria Coal & Coke Co. Ltd | Wakefield | Yorkshire | 1882 | BT31 | 14715 | 17236 |
| Victoria Coal & Iron Co. (Swansea Vale) Ltd | Ystalyfera | Glamorganshire | 1872 | BT31 | 1793 | 6824 |
| Victoria Colliery Co. (Barnsley) Ltd | Barnsley | Yorkshire | 1912 | BT31 | 20730 | 122568 |
| Victoria Colliery Co. Ltd | St Helens | Lancashire | 1866 | BT31 | 1234 | 2892C |
| Victoria Colliery Co. Ltd | St Helens | Lancashire | 1894 | BT31 | 5922 | 41662 |
| Vistula Colliery Co. Ltd | 1862 | BT31 | 717 | 113C | ||
| Vitrified Coal Co. Ltd | 1913 | BT31 | 21396 | 128499 | ||
| Vlaklaagte French Coal Mining Co. Ltd | 1896 | BT31 | 15694 | 50138 | ||
| Vogelfontein Coal Mining Co. Ltd | 1892 | BT31 | 5404 | 37242 | ||
| Vogrie Coal & Fire-Clay Co. Ltd | 1893-1898 | BT2 | 2427 | |||
| Vron Colliery Co. Ltd | Brymbo | Denbighshire | 1872 | BT31 | 1729 | 6343 |
| Vron Colliery Ltd | Brymbo | Denbighshire | 1887 | BT31 | 3931 | 24895 |
| Vulcan Brown Coal Co. Ltd | 1928 | BT31 | 33025 | 235324 | ||
| Wackerfield Coal Co. Ltd | 1914 | BT31 | 14229 | 134587 | ||
| Waddington (Coal) Ltd | 1930 | BT31 | 33186 | 248950 | ||
| Waen & Nerquis Collieries Ltd | Nercwys | Flintshire | 1895 | BT31 | 6439 | 45410 |
| Wain Colliery Co. Ltd | 1874 | BT31 | 2048 | 8954 | ||
| Waingap Collieries Ltd | Whitworth | Lancashire | 1916 | BT31 | 23205 | 143319 |
| Waitahu (New Zealand) Colliery Ltd | 1917 | BT31 | 32239 | 147676 | ||
| Wakefield Colliery Factors & Engineering Co. Ltd | 1891 | BT31 | 5039 | 33814 | ||
| Walbottle Coal & Firebrick Co. Ltd | Woolsington | Northumberland | 1901 | BT31 | 9660 | 71812 |
| Walbottle Coal & Fireclay Co. Ltd | Woolsington | Northumberland | 1917 | BT31 | 23582 | 146337 |
| Waldie Coal & Shipping Co. Ltd | 1914 | BT31 | 22627 | 138639 | ||
| Waldridge Coal Co. Ltd | Woolsington | Durham | 1891 | BT31 | 5069 | 34083 |
| Walker Coal Co. Ltd | Newcastle upon Tyne | Northumberland | 1883 | BT31 | 14738 | 18322 |
| Walkley Lane Colliery Co. Ltd | Dewsbury | Yorkshire | 1921 | BT31 | 26707 | 175958 |
| Wallarah Coal Co. Ltd | 1888 | BT31 | 4142 | 26721 | ||
| Wallasey Coal Co. Ltd | 1882 | BT31 | 3065 | 17462 | ||
| Wallface Colliery Co. Ltd | 1893 | BT31 | 5576 | 38805 | ||
| Wallsend & Hebburn Coal Co. Ltd | Newcastle upon Tyne | Northumberland | 1892 | BT31 | 38711 | 35792 |
| Wallsend & Silkstone Coal Co. Ltd | 1901 | BT31 | 9497 | 70555 | ||
| Wallsend Coal Co. Ltd | 1880 | BT31 | 2643 | 14034 | ||
| Wallsend Coal Trolly Co. Ltd | 1899 | BT31 | 8712 | 63646 | ||
| Wallsend Colliery Co. Ltd | Newcastle upon Tyne | Northumberland | 1858 | BT31 | 339 | 1217 |
| Wallsend Main Colliery Co. Ltd | 1904 | BT31 | 17221 | 80743 | ||
| Wallsend Natal Collieries Ltd | 1912 | BT31 | 20870 | 123751 | ||
| Walmsley Collieries Ltd | 1889 | BT31 | 4465 | 29108 | ||
| Walsall Wood Colliery Co. Ltd | 1875 | BT31 | 37022 | 10004 | ||
| Walton Coal Co. Ltd | 1872 | BT31 | 1699 | 6112 | ||
| Wandsworth Coal Co. Ltd | 1926 | BT31 | 29567 | 215367 | ||
| Wankie (Rhodesia) Coal Railway & Exploration Co. Ltd | 1899 | BT31 | 8477 | 61681 | ||
| Wankie Colliery Co. Ltd | 1914 | BT31 | 22643 | 138789 | ||
| Wankie Colliery Co. Ltd | 1909 | BT31 | 12895 | 104695 | ||
| Wankie Colliery Co. Ltd | 1923 | BT31 | 36409B-364 | 193363 | ||
| Wansbeck Colliery Co. Ltd | Morpeth | Northumberland | 1905 | BT31 | 11294 | 86386 |
| Wapping Coal Co. Ltd | 1913 | BT31 | 14162 | 131020 | ||
| Wardle Colliery Co. Ltd | Rochdale | Lancashire | 1908 | BT31 | 12606 | 100777 |
| Ware Gas Light & Coal & Coke Co. Ltd | 1868 | BT31 | 14401 | 3867 | ||
| Wareham Gas Light & Coke & Coal Co. Ltd | 1880 | BT31 | 2730 | 14780 | ||
| Warmley Collieries Co. Ltd | Bristol | Gloucestershire | 1880 | BT31 | 2690 | 14459 |
| Warmley Colliery & Spelter Works Co. Ltd | 1862 | BT31 | 607 | 2548 | ||
| Warren Llantwit Red Ash Colliery Co. Ltd | 1902 | BT31 | 10079 | 75435 | ||
| Warwick Coal & Trading Co. Ltd | 1921 | BT31 | 26474 | 173384 | ||
| Warwick Provision Coal & Discount Co. Ltd | 1866 | BT31 | 1256 | 3036 | ||
| Warwickshire Coal Co. Ltd | Keresley | Worcestershire | 1901 | BT31 | 9339 | 69384 |
| Warwickshire Coal Co. Ltd (The) | Keresley | Worcestershire | 1911 | BT31 | 38315-3831 | 114214 |
| Warwickshire Iron Brick Tile & Colliery Co. Ltd | 1864 | BT31 | 1007 | 1595C | ||
| Washington Coal Co. Ltd | 1895 | BT31 | 38718 | 43215 | ||
| Waterloo & Woodlesford Coal Co. Ltd | 1872 | BT31 | 1683 | 5990 | ||
| Waterloo Colliery Co. Ltd | Leeds | Yorkshire | 1895 | BT31 | 6244 | 44244 |
| Watford District Coal Association Ltd | 1899 | BT31 | 8309 | 60360 | ||
| Wath Main Colliery Co. Ltd | Wath upon Dearne | Yorkshire | 1900 | BT31 | 37219 | 66048 |
| Wath upon Dearne Main Colliery Co. Ltd | Wath upon Dearne | Yorkshire | 1876 | BT31 | 2177 | 10168 |
| Waverley Coal Co. Ltd | Sheffield | Yorkshire | 1894 | BT31 | 5985 | 42212 |
| Waynes Merthyr Steam Coal & Iron Works Co. Ltd | Aberdare | Glamorganshire | 1874 | BT31 | 1935 | 8046 |
| Weald District Gas Light Coke & Coal Supply Ltd | 1911 | BT31 | 13495 | 113661 | ||
| Weardale Iron & Coal Co. Ltd | Middridge | Durham | 1863 | BT31 | 806 | 559C |
| Weardale Steel Coal & Coke Co. Ltd | Middridge | Durham | 1899 | BT31 | 37193-3721 | 63715 |
| Wearmouth Coal Co. Ltd | Sunderland | Durham | 1878 | BT31 | 2395 | 11942 |
| Wedgwood Coal & Iron Co. Ltd | 1872 | BT31 | 1794 | 6832 | ||
| Wednesbury Coal Co. Ltd | 1874 | BT31 | 2020 | 8743 | ||
| Weedon Gaslight Coke & Coal Co. Ltd | 1856 | BT31 | 14267 | 60 | ||
| Wellesbourne Gas Light Coke & Coal Co. | 1864 | BT31 | 30733 | 1704C | ||
| Wellington Coal & Gas Light Company | 1856 | BT31 | 91 | 318 | ||
| Wellington Coal & Tilery Co. Ltd | 1902 | BT31 | 16868 | 74549 | ||
| Wellington Colliery (Stopes) Co. Ltd | Stopes | Lancashire | 1913 | BT31 | 21713 | 131114 |
| Wellington Iron & Coal Co. Ltd | 1873 | BT31 | 1880 | 7482 | ||
| Welsh Anthracite Collieries & Roumanian Asphalte Co. Ltd | 1910 | BT31 | 13450 | 112813 | ||
| Welsh Anthracite Collieries Co. Ltd | 1902 | BT31 | 10116 | 75774 | ||
| Welsh Anthracite Collieries Ltd | Abercraf | Breconshire | 1926 | BT31 | 38425 | 211117 |
| Welsh Anthracite Collieries Ltd | 1892 | BT31 | 5346 | 36641 | ||
| Welsh Associated Collieries Ltd | 1930 | BT31 | 35521-3552 | 245288 | ||
| Welsh Coal Estates Syndicate Ltd | 1906 | BT31 | 11663 | 90191 | ||
| Welsh Coal Mines Ltd | 1891 | BT31 | 5145 | 34733 | ||
| Welsh Coal Mines Ltd | 1891 | BT31 | 5145 | 34733 | ||
| Welsh Collieries Investment Trust Ltd | 1934 | BT31 | 33527 | 289950 | ||
| Welsh Collieries Mutual Indemnity Society Ltd (The) | 1929 | BT31 | 36691 | 240615 | ||
| Welsh Export Collieries Ltd | 1911 | BT31 | 19808 | 113595 | ||
| Welsh Freehold Coal & Iron Co. Ltd | 1872 | BT31 | 1694 | 6073 | ||
| Welsh Main Coal Co. Ltd | 1874 | BT31 | 1930 | 7982 | ||
| Welsh Navigation Steam Coal Co. Ltd | Tonyrefail | Glamorganshire | 1906 | BT31 | 38273-3827 | 87692 |
| Welsh Steam Coal Collieries | 1874 | BT31 | 1866 | 7366 | ||
| Welsh Steam Coal Collieries Ltd | Killay | Glamorganshire | 1873 | BT31 | 1866 | 7366 |
| Welsh United Collieries Ltd | 1895 | BT31 | 6231 | 44168 | ||
| Welsh Wallsend Colliery Co. Ltd | 1874 | BT31 | 2012 | 8683 | ||
| Wemyss Coal Co. Ltd | 1894 | BT2 | 2655 | |||
| Wemyss Estates & Collieries Ltd | 1892 | BT31 | 5255 | 35780 | ||
| Wenallt Coal Co. Ltd | 1860 | BT31 | 487 | 1921 | ||
| Wenallt Colliery Co. Ltd | Aber Dulais | Glamorganshire | 1899 | BT31 | 8623 | 62869 |
| Wenallt Merthyr Colliery Co. Ltd | Neath | Glamorganshire | 1884 | BT31 | 3291 | 19425 |
| Wenallt Merthyr Steam Coal Colliery Co. Ltd | Aberdylais | Glamorganshire | 1920 | BT31 | 25489 | 163117 |
| Wentworth Silkstone Collieries Ltd | Barnsley | Yorkshire | 1912 | BT31 | 20837 | 123485 |
| Wern Collieries Ltd | Llanmorlais | Glamorganshire | 1909 | BT31 | 12858 | 104132 |
| Wernddu Coal & Brick Co. Ltd | Caerphilly | Glamorganshire | 1893 | BT31 | 15328 | 39276 |
| Wernddu Railway & Colliery Co. Ltd | Alltwen | Glamorganshire | 1899 | BT31 | 31815 | 63030 |
| Wernpistill Colliery Co. Ltd | 1873 | BT31 | 1918 | 7877 | ||
| West Australian Collieries & Fireclay Co. Ltd | 1899 | BT31 | 8447 | 61478 | ||
| West Beechburn Coal & Whinstone Co. Ltd | Howden le Wear | Durham | 1913 | BT31 | 21158 | 126475 |
| West Bromwich Colliery Co. Ltd | 1873 | BT31 | 1891 | 7584 | ||
| West Buckley Colliery Co. Ltd | Alltami | Flintshire | 1909 | BT31 | 18689 | 101211 |
| West Butterknowle Colliery Co. Ltd | Butterknowle | Durham | 1918 | BT31 | 23949 | 149505 |
| West Cannock Colliery Co. Ltd | Hednesford | Staffordshire | 1869 | BT31 | 36738 | 4627 |
| West Cottingwood Coal Co. Ltd | Morpeth | Northumberland | 1907 | BT31 | 12104 | 94777 |
| West Cumberland Union Collieries Ltd | Cumberland | 1874 | BT31 | 1938 | 8072 | |
| West Dronfield Colliery Co. Ltd | 1873 | BT31 | 1905 | 7727 | ||
| West Durham Wallsend Coal Co. Ltd | Shildon | Durham | 1892 | BT31 | 15274 | 37687 |
| West Glamorgan Collieries Ltd | Clyne Valley | Glamorganshire | 1919 | BT31 | 24857 | 157322 |
| West Gloster Colliery Co. Ltd | Bedminster | Gloucestershire | 1895 | BT31 | 6086 | 43067 |
| West Gloucestershire Collieries Ltd | Gloucestershire | 1927 | BT31 | 29720 | 218793 | |
| West Hallam Colliery Co. Ltd | Ilkeston | Derbyshire | 1895 | BT31 | 35790 | 45400 |
| West Hull Coaling Co. Ltd | 1921 | BT31 | 26687 | 175713 | ||
| West Kent Collieries Syndicate Ltd | 1897 | BT31 | 7479 | 53228 | ||
| West Lancashire Collieries & Fireclay Works Ltd | 1877 | BT31 | 2308 | 11170 | ||
| West Leeswood Collieries Ltd | Coed Talon | Flintshire | 1914 | BT31 | 32198 | 138604 |
| West London & Provincial Coal & Coke Co. Ltd | 1876 | BT31 | 2268 | 10853 | ||
| West London Coal & Flour Co. Ltd | 1866 | BT31 | 1294 | 3288 | ||
| West London Family Coal Association Ltd | 1873 | BT31 | 1877 | 7454 | ||
| West Mickley Coal Co. Ltd | Prudhoe | Northumberland | 1899 | BT31 | 16290 | 64126 |
| West Mostyn Coal & Iron Co. Ltd | Mostyn | Flintshire | 1873 | BT31 | 1916 | 7858 |
| West Rhondda Colliery Co. Ltd | Lletty Brongu | Glamorganshire | 1909 | BT31 | 18964 | 104489 |
| West Silkstone Colliery Co. Ltd | Barnsley | Yorkshire | 1908 | BT31 | 12283 | 96786 |
| West Swansea Colliery Co. Ltd | Swansea | Glamorganshire | 1872 | BT31 | 1758 | 6562 |
| West Walbottle Coal Co. Ltd | Woolsington | Northumberland | 1919 | BT31 | 24531 | 154300 |
| West Wallsend Colliery Co. Ltd | 1878 | BT31 | 2423 | 12214 | ||
| West Yorkshire Coal Sales Association Ltd (The) | 1936 | BT31 | 36715 | 317923 | ||
| West Yorkshire Consolidated Collieries Ltd | 1939 | BT31 | 35747 | 353557 | ||
| West Yorkshire Iron & Coal Co. Ltd | Leeds | Yorkshire | 1866 | BT31 | 1272 | 3140 |
| Western & Near East Coal Co. Ltd | 1923 | BT31 | 28040 | 191787 | ||
| Western Coal Syndicate Ltd | 1903 | BT31 | 10462 | 78892 | ||
| Western Colliery Co. Ltd | 1892 | BT31 | 5440 | 37587 | ||
| Western Counties Colliery & Iron Co. Ltd | Coleford | Gloucestershire | 1864 | BT31 | 955 | 1298C |
| Western Dominion Collieries Ltd | 1906 | BT31 | 33775 | 88896 | ||
| Western Gas Coal Collieries Ltd | 1918 | BT31 | 24027 | 150188 | ||
| Western Merthyr Coal & Fuel Co. Ltd | Clydach | Glamorganshire | 1875 | BT31 | 38686 | 10053 |
| Westgate Brick & Coal Co. Ltd | 1902 | BT31 | 10049 | 75159 | ||
| Westhoughton Coal & Cannel Co. Ltd | Westhoughton | Lancashire | 1872 | BT31 | 34126 | 6378 |
| Westminster Brymbo Coal & Coke Co. Ltd | Gwersyllt | Denbighshire | 1858 | BT31 | 14299 | 1145 |
| Westminster Colliery Co. Ltd | Gwersyllt | Denbighshire | 1922 | BT31 | 27532 | 185296 |
| Weston Coyney & Cinderhill Coal & Brick Co. Ltd | 1880 | BT31 | 2647 | 14064 | ||
| Westport Wallsend Coal Co. Ltd | 1889 | BT31 | 4600 | 30168 | ||
| Westwood Manor Coal & Iron Co. Ltd | 1906 | BT31 | 11600 | 89590 | ||
| Weymouth & Melcombe Regis Gas Light Coal & Coke Co. | 1864 | BT31 | 923 | 1139C | ||
| Whangarei Oil & Coal Syndicate Ltd | 1913 | BT31 | 21642 | 130474 | ||
| Wharfedale Coal Co. Ltd | Addingham | Yorkshire | 1924 | BT31 | 28526 | 198085 |
| Wharncliffe Woodmoor Colliery Co. Ltd | Barnsley | Yorkshire | 1883 | BT31 | 42892 | 17948 |
| Wharncliffe Woodmoor Colliery Co. Ltd | Barnsley | Yorkshire | 1873 | BT31 | 1902 | 7699 |
| Wheal Gwendraeth Valley Collieries Co. Ltd | 1881 | BT31 | 2822 | 15485 | ||
| Wheldale Coal Co. Ltd | Castleford | Yorkshire | 1867 | BT31 | 14394 | 3650 |
| Whinmoor Colliery Co. Ltd | Cawthorne | Yorkshire | 1909 | BT31 | 13022 | 106467 |
| Whiston Collieries Co. Ltd | 1895 | BT31 | 6589 | 46357 | ||
| Whitburn Coal Co. Ltd | 1873 | BT31 | 1853 | 7282 | ||
| White Lea Colliery Co. Ltd | Dewsbury | Yorkshire | 1888 | BT31 | 4277 | 27744 |
| White Lea Colliery Co. Ltd | Dewsbury | Yorkshire | 1900 | BT31 | 16331 | 64855 |
| White Moss Coal Co. Ltd | Skelmersdale | Lancashire | 1865 | BT31 | 30741 | 2533C |
| White Oak Colliery Co. Ltd | 1874 | BT31 | 2049 | 8974 | ||
| White River Colorado Coal Syndicate Ltd | 1890 | BT31 | 4704 | 31004 | ||
| Whitefield Colliery Co. Ltd | Mold | Flintshire | 1873 | BT31 | 1915 | 7839 |
| Whitehaven Collieries Ltd (The) | Whitehaven | Cumberland | 1933 | BT31 | 35581 | 279151 |
| Whitehaven Colliery Co. Ltd | Whitehaven | Cumberland | 1914 | BT31 | 35138 | 133801 |
| Whitfield Colliery Co. Ltd | 1868 | BT31 | 1415 | 4089 | ||
| Whittington & Sheepbridge Colliery Co. Ltd | 1873 | BT31 | 1911 | 7794 | ||
| Whittington Colliery Co. Ltd | Chesterfield | Derbyshire | 1866 | BT31 | 1274 | 3157 |
| Whittington Freehold Colliery Co | 1864 | BT31 | 823 | 649C | ||
| Whittington Freehold Colliery Co. Ltd | 1863 | BT31 | 823 | 649C | ||
| Whittington Peat Coal Syndicate Ltd | 1896 | BT31 | 6639 | 46699 | ||
| Whittington Silkstone Colliery Co. Ltd | Chesterfield | Derbyshire | 1874 | BT31 | 1936 | 8048 |
| Whittle Burn Coal Co. Ltd | Horsley on Tyne | Northumberland | 1911 | BT31 | 13707 | 117752 |
| Whitwick Colliery Co. Ltd | Leicestershire | 1873 | BT31 | 37468 | 7576 | |
| Whitworth Collieries Ltd | Port Talbot | Glamorganshire | 1905 | BT31 | 11236 | 85822 |
| Whitworth Colliery Co. Ltd | 1894 | BT31 | 5886 | 41347 | ||
| Widdrington Coal Co. Ltd | Stobbswood | Northumberland | 1909 | BT31 | 19031 | 105329 |
| Wigan & Rainford Coal Co. Ltd | 1896 | BT31 | 7096 | 50028 | ||
| Wigan & Welsh Coal Co. Ltd | 1866 | BT31 | 1235 | 2902C | ||
| Wigan & Whiston Coal Co. Ltd | Wigan | Lancashire | 1866 | BT31 | 1263 | 3082 |
| Wigan Cannel Colliery Ltd | Standish | Lancashire | 1893 | BT31 | 5601 | 39003 |
| Wigan Coal & Iron Co. Ltd | Haigh | Lancashire | 1865 | BT31 | 37920 | 2650 |
| Wigan Coal Corporation Ltd (The) | Hindley | Lancashire | 1930 | BT31 | 38048 | 249907 |
| Wigan Junction Colliery Co. Ltd | Abram | Lancashire | 1875 | BT31 | 30874 | 9933 |
| Wigginton Hall Colliery Co. Ltd | 1874 | BT31 | 1965 | 8332 | ||
| Wigglesworth Colliery Co. Ltd | Cockfield | Durham | 1922 | BT31 | 27254 | 182203 |
| Wilberforce Coal Co. Ltd | 1885 | BT31 | 3481 | 21126 | ||
| Wilkin Colliery Co. Ltd | 1920 | BT31 | 26264 | 171047 | ||
| Willingsworth Colliery Co. Ltd | 1875 | BT31 | 2149 | 9951 | ||
| Willingsworth Colliery Ltd | Tipton | Staffordshire | 1914 | BT31 | 22576 | 138181 |
| Willow Main Colliery Co. Ltd | 1882 | BT31 | 3004 | 16937 | ||
| Wilncote Collieries & Blue Iron Brick Co. Ltd | 1864 | BT31 | 965 | 1354C | ||
| Wilton Gas Coke & Coal Company | 1856 | BT31 | 72 | 263 | ||
| Wimberry Colliery Co. Ltd | Clearwell | Gloucestershire | 1893 | BT31 | 5742 | 40195 |
| Wincanton Coal Gas Co. Ltd | 1878 | BT31 | 34155 | 12108 | ||
| Winco Wood Colliery Ltd | Sheffield | Yorkshire | 1923 | BT31 | 28084 | 192325 |
| Windmill Colliery Co. Ltd | Upholland | Lancashire | 1893 | BT31 | 5537 | 38481 |
| Windsor Steam Coal Co. (1901) Ltd | Abertridwr | Glamorganshire | 1901 | BT31 | 16674 | 70655 |
| Windsor Steam Coal Co. Ltd | Abertridwr | Glamorganshire | 1896 | BT31 | 6969 | 49062 |
| Wingello Coal Co. Ltd | 1888 | BT31 | 14900 | 25659 | ||
| Wingham & Stour Valley Collieries Ltd | 1911 | BT31 | 19864 | 114142 | ||
| Winsley Colliery Co. Ltd | Hartwith cum Winsley | 1873 | BT31 | 1802 | 6899 | |
| Winstanley Collieries Co. Ltd | Ashton-in-Makerfield | Lancashire | 1885 | BT31 | 31030 | 21717 |
| Winter Coal Co. Ltd | Barnsley | Yorkshire | 1924 | BT31 | 28781 | 201585 |
| Wirral Colliery Co. Ltd | Little Neston | Cheshire | 1885 | BT31 | 3429 | 20652 |
| Wirral Colliery Co. Ltd | Little Neston | Cheshire | 1911 | BT31 | 20383 | 119379 |
| Witley Coal & Fireclay Co. Ltd | 1889 | BT31 | 4341 | 28182 | ||
| Witley Colliery Co. Ltd | Short Cross | Worcestershire | 1874 | BT31 | 2041 | 8885 |
| Witwatersrandt Land & Collieries Co. Ltd | 1889 | BT31 | 4548 | 29789 | ||
| Wivenhoe Gas & Coal Co. Ltd | 1890 | BT31 | 4938 | 32931 | ||
| Wollaston Gas Coal & Coke Co. Ltd | 1869 | BT31 | 30777 | 4351 | ||
| Wollaton Colliery Co. Ltd | Wollaton | Nottinghamshire | 1875 | BT31 | 2086 | 9320 |
| Wolseley Park Collieries Ltd | 1901 | BT31 | 9397 | 69802 | ||
| Wolsingham Park, Dinas & Fire Brick Mineral & Coal Co. Ltd | Wolsingham | Durham | 1873 | BT31 | 1898 | 7664 |
| Wood Farm Colliery Co. Ltd | Bloxwich | Staffordshire | 1902 | BT31 | 16814 | 73640 |
| Woodfield Collieries Ltd | 1907 | BT31 | 18209 | 94893 | ||
| Woodfield Collieries Ltd | 1905 | BT31 | 11243 | 85887 | ||
| Woodhorn Coal Co. Ltd | 1880 | BT31 | 2684 | 14390 | ||
| Woodhouse Colliery Co. Ltd | 1869 | BT31 | 1449 | 4307 | ||
| Woodhouse Colliery Co. Ltd (The) | 1928 | BT31 | 30352 | 234428 | ||
| Woodifield Coal Co. Ltd | 1922 | BT31 | 27382 | 183640 | ||
| Woodland Collieries Co. Ltd | Cockfield | Durham | 1880 | BT31 | 2707 | 14583 |
| Woodmuir Colliery Co. Ltd | 1895-1904 | BT2 | 3041 | |||
| Woods Trimdon Collieries Ltd | Trimdon | Durham | 1873 | BT31 | 1913 | 7821 |
| Woodside Collieries Ltd | Dudley | Worcestershire | 1928 | BT31 | 30225 | 230675 |
| Woodstock Gas Light Coke & Coal Co. | 1856 | BT31 | 101 | 345 | ||
| Woolaton Collieries Co. Ltd | 1901 | BT31 | 36850 | 70993 | ||
| Woolley Coal Co. Ltd | Woolley | Yorkshire | 1867 | BT31 | 1353 | 3648 |
| Woolley Moor Colliery Co. Ltd | Woolley | Yorkshire | 1896 | BT31 | 6953 | 48950 |
| Woolston Itchen & Bitterne Gas Coal & Coke Co. | 1864 | BT31 | 872 | 882C | ||
| Woolston Shipping & Coal Co. Ltd | 1870 | BT31 | 1535 | 4883 | ||
| Wootton Bassett Gas Coal Coke & Fitting Co. Ltd | Wootton Bassett | Wiltshire | 1859 | BT31 | 30689 | 1431 |
| Wootton Coal Co. Ltd | 1864 | BT31 | 14361 | 1606c | ||
| Worcester Coal & Iron Co. Ltd | 1912 | BT31 | 21016 | 125145 | ||
| Workington Collieries Co. Ltd | 1875 | BT31 | 2162 | 10062 | ||
| Worsborough Coal & Coke Co. Ltd | 1899 | BT31 | 8760 | 64146 | ||
| Worthington Colliery & Pipe Co. Ltd | Leicestershire | 1908 | BT31 | 18439 | 98053 | |
| Wortley Armley & District Coal Co. Ltd | Leeds | Yorkshire | 1890 | BT31 | 4884 | 32468 |
| Wrexham & Acton Collieries Co. Ltd | Wrexham | Denbighshire | 1863 | BT31 | 14345 | 821C |
| Wrexham Colliery Co. Ltd | Wrexham | Denbighshire | 1921 | BT31 | 26739 | 176379 |
| Wrington Gas Coal & Coke Co. Ltd | 1873 | BT31 | 1858 | 7313 | ||
| Wye Colliery Co. Ltd | 1881 | BT31 | 2909 | 16197 | ||
| Wyken Colliery Co. Ltd | 1909 | BT31 | 19044 | 105501 | ||
| Wylam Coal Co. Ltd | 1912 | BT31 | 13907 | 122325 | ||
| Wylam Coal Co. Ltd | Wylam | Northumberland | 1883 | BT31 | 3263 | 19189 |
| Wylam Wood Coal Co. Ltd | Wylam | Northumberland | 1874 | BT31 | 1949 | 8192 |
| Wylva Colliery Co. Ltd | 1865 | BT31 | 1057 | 1870C | ||
| Wynn Hall Coal Co. Ltd | 1865 | BT31 | 1100 | 2118C | ||
| Wynnstay Collieries Ltd | Ruabon | Denbighshire | 1889 | BT31 | 14998 | 29254 |
| Wyoming Coal & Coke Co. Ltd | Wyoming | U.S.A. | 1885 | BT31 | 3550 | 21693 |
| Wyre Forest Coal & Clay Fields Development Co. Ltd | 1898 | BT31 | 8267 | 59999 | ||
| Wyrley Cannock Colliery Co. Ltd | 1879 | BT31 | 2527 | 13079 | ||
| Wyrley Cannock Colliery Co. Ltd | 1865 | BT31 | 1166 | 2499C | ||
| Wythemoor Colliery & Chemical Co. Ltd | Distington | Cumberland | 1885 | BT31 | 3561 | 21777 |
| Wythemoor Colliery Co. Ltd | Distington | Cumberland | 1904 | BT31 | 17167 | 79731 |
| Yate Collieries & Limeworks Co. Ltd | 1877 | BT31 | 2390 | 11886 | ||
| Ynisarwed Resolven Colliery Co. Ltd | 1873 | BT31 | 1808 | 6945 | ||
| Yniscedwyn Iron Steel & Coal Co. Ltd | Ystradgynlais | Glamorganshire | 1870 | BT31 | 1548 | 4962 |
| Ynisdawela Collieries Ltd | 1907 | BT31 | 11895 | 92573 | ||
| Ynisgynon Collieries Ltd | 1915 | BT31 | 22884 | 140767 | ||
| Ynys Amman Colliery Co. Ltd | Brynamman | Carmarthenshire | 1908 | BT31 | 18386 | 97318 |
| Ynysavon (1916) Colliery Co. Ltd | 1916 | BT31 | 23280 | 143917 | ||
| Ynysavon Colliery Co. Ltd | 1914 | BT31 | 14237 | 135304 | ||
| Ynysläs Colliery Co. Ltd | Cwmavon | Glamorganshire | 1917 | BT31 | 23808 | 148369 |
| Yorkshire Amalgamated Collieries Ltd | 1927 | BT31 | 38437-3843 | 220133 | ||
| Yorkshire Coal & Steam Shipping Co. Ltd | 1912 | BT31 | 20817 | 123315 | ||
| Yorkshire Coal & Steamship Co. Ltd | 1873 | BT31 | 1899 | 7672 | ||
| Yorkshire Coal Depots Ltd | 1923 | BT31 | 27664 | 186807 | ||
| Yorkshire Coal Distillation Ltd | 1920 | BT31 | 26359 | 172068 | ||
| Yorkshire Coal Export Syndicate Ltd | 1904 | BT31 | 10707 | 81150 | ||
| Yorkshire Coal Owners Mutual Indemnity Co. Ltd | 1898 | BT31 | 36225 | 57730 | ||
| Yorkshire Coal Products Ltd | 1920 | BT31 | 25544 | 163643 | ||
| Yorkshire Coal Products Ltd | 1924 | BT31 | 28765 | 201360 | ||
| Yorkshire Collieries Direct Supplies Ltd | 1926 | BT31 | 29484 | 213481 | ||
| Yorkshire Iron & Coal Co. Ltd | Leeds | Yorkshire | 1901 | BT31 | 34666 | 69629 |
| Yorkshire Iron & Coal Co. Ltd | Leeds | Yorkshire | 1901 | BT31 | 34667 | 69629 |
| Yorkshire Main Colliery (1923) Ltd | Edlington | Yorkshire | 1923 | BT31 | 38548 | |
| Yorkshire Main Colliery Ltd | Edlington | Yorkshire | 1913 | BT31 | 21158 | 126476 |
| Ystradowen Colliery Co. Ltd | Upper Cwmtwrch | Carmarthenshire | 1903 | BT31 | 17013 | 77147 |
| Yugoslavian Collieries Ltd | 1925 | BT31 | 32728 | 210233 | ||
| Yukon Coal & Petroleum Syndicate Ltd | 1898 | BT31 | 8188 | 59240 |
