| Blyth (1950 - 1983) |
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| Bolsover (1950) |
Full name (in Craig 4) Derbyshire, Bolsover |
| Bolton East (1950 - 1983) |
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| Bolton West (1950) |
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| Bournemouth East and Christchurch (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bournemouth West (1950) |
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| Bridlington (1950 - 1997) |
Full name (in Craig 4) Yorkshire (East Riding), Bridlington |
| Brierley Hill (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 4) Staffordshire, Brierley Hill |
| Brighouse and Spenborough (1950 - 1983) |
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| Brighton, Kemptown (1950 - 2024) |
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| Brighton, Pavilion (1950) |
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| Bristol North East (1950 - 1983) |
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| Bristol North West (1950) |
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| Bristol South East (1950 - 1983) |
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| Bromsgrove (1950) |
Full name (in Craig 4) Worcestershire, Bromsgrove |
| Buckinghamshire South (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bury and Radcliffe (1950 - 1983) |
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| Bute and North Ayrshire (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 4) Ayrshire and Bute, Bute and North Ayrshire |
| Caernarvon (1950 - 1983) |
See also alternative (Welsh) spelling Caernarfon, used in sources from 1983. Full name (in Craig 4) Caernarvonshire, Caernarvon. |
| Cardiff North (1950) |
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| Cardiff South East (1950 - 1983) |
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| Cardiff West (1950) |
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| Carlton (1950 - 1983) |
Full name (in Craig 4) Nottinghamshire, Carlton |
| Central Ayrshire (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 4) Ayrshire and Bute, Central Ayrshire |
| Cheadle (1950) |
Full name (in Craig 4) Cheshire, Cheadle |