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Warning: This is not intended to be an exhaustive history of the companies listed, but an
indication of the changes of ownership and the links between companies and directors in
those companies. Only collieries, pits etc. in the North of England are shown - the
companies may own other properties etc. outside this area and there may have been other
changes of ownership etc. for which we currently do not have details.
Entries added or updated since 01 Jun 2008 are highlighted thus: 
| | Company | Company Details |
|---|
|
Backworth Collieries Ltd. |
1923, 1933, 1937, 1940, 1947 |
| |
Bain, Sir James & Co. |
|
| |
Barcus Close Coal Co. Ltd. |
1923, 1933, 1937, 1940, 1947 |
| |
Barhaugh Anthracite and Limestone Co. Ltd. |
1923 |
| |
Barrack Main Colliery Co. Ltd. |
1923 |
| |
Barrow Hematite Steel Co. Ltd. |
|
| |
Basinghall Mining Syndicate Ltd. |
|
| |
Bearpark Coal & Coke Co. Ltd. |
1923, 1933, 1937, 1940, 1947 |
| |
Bebside & Choppington Coal Co. |
|
| |
Bebside Coal Co. Ltd. |
1923 |
| |
Beckermet Mining Co. Ltd. |
|
| |
Bedlington Coal Co. |
|
| |
Bedlington Coal Co. Ltd. |
1923, 1933, 1937, 1940, 1947 |
| |
Beechburn Coal & Firebrick Co. Ltd. |
|
|
Bell Bros. Ltd. |
1923 |
| |
Bell, J. H. |
1933, 1937 |
| |
Bells House Coal Co. |
1933, 1937, 1940 |
| |
Benson, Wm. & Sons Ltd. |
1923, 1933, 1937, 1940, 1947 |
|
Bentinck West Hartley Colliery (Owners of) |
1923, 1933, 1937, 1940, 1947 |
| |
Bewick & Partners |
|
| |
Bewick, R. J. & Brothers |
1933 |
| |
Bigrigg Mining Co. Ltd. |
|
| |
Bildershaw Coal Co. Ltd. |
1933, 1937, 1940 |
| |
Billing Ganister & Mineral Co. Ltd. |
|
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Birkby Coal Co. |
1923 |
| |
Birkby Coal Co. Ltd. |
1933, 1937, 1940, 1947 |
| |
Birkshaw Colliery Co. Ltd. |
1933, 1937, 1940, 1947 |
|
Birtley Iron Co. |
|
| |
Black Boy Coal Co. |
|
| |
Blackett and South Tyne Collieries Ltd. |
1923 |
| |
Blackwell, Geo. G., Sons & Co. Ltd. |
|
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Blanchland Fluor Mines Ltd. |
|
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Blenkinsopp Collieries Ltd. |
|
| |
Bolckow, Vaughan & Co. Ltd. |
1923 |
| |
Boulder Flint Co. Ltd. |
|
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Bowes, John & Partners |
1841, 1854 |
|
Bowes, John & Partners Ltd |
1841, 1923, 1933, 1937, 1940, 1947 |
| |
Bradleys (Weardale) Ltd. |
|
| |
Brancepeth Coal Co. Ltd |
1937, 1947 |
| |
Brevace Ltd. |
|
| |
Brinkburn Coal Co. |
|
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British Coal |
|
| |
British Gypsum Ltd. |
|
| |
British Steel Corporation |
|
| |
Broomhill Coal Co. Ltd. |
|
| |
Broomhill Collieries Ltd. |
1923, 1933, 1937, 1940, 1947 |
| |
Broughton Moor Green Slate Quarries Ltd. |
|
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Brusselton Colliery Co. Ltd. |
1933, 1937, 1940, 1947 |
| |
Bullocks Hall Colliery Co. Ltd. |
1923 |
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Burn Fireclay Co. Ltd. |
|
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Burnhouse Coal Co. |
|
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Burradon and Coxlodge Coal Co. Ltd. |
1923 |
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Burrell & Jackson |
1933 |
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Butterknowle & Cockfield Coal Co. |
1923 |
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Butterknowle Coal Co. |
|
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Butterknowle Colliery Co. Ltd. |
|
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Butterknowle Marsfield Collieries Ltd. |
1940 |
| |
Buttermere Green Slate Co. Ltd. |
|
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Buttermere Green Slate Quarries Ltd. |
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