| Aberdeenshire and Kincardineshire Central (1918 - 1950) |
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| Aberdeenshire and Kincardineshire Eastern (1918 - 1950) |
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| Antrim (1922 - 1950) |
Constituency of same name also existed 1832-1885. |
| Ayr District of Burghs (1832 - 1950) |
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| Barnard Castle (1885 - 1950) |
Full name (in Craig 2,3) Durham, Barnard Castle |
| Barnstaple (1832 - 1950) |
Full name (in Craig 2,3) Devon, Barnstaple |
| Bermondsey Rotherhithe (1918 - 1950) |
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| Bermondsey West Bermondsey (1918 - 1950) |
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| Berwickshire and Haddingtonshire (1918 - 1950) |
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| Bethnal Green North East (1885 - 1950) |
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| Bethnal Green South West (1885 - 1950) |
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| Bewdley (1832 - 1950) |
Full name (in Craig 2,3) Worcestershire, Bewdley |
| Birkenhead East (1918 - 1950) |
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| Birkenhead West (1918 - 1950) |
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| Birmingham, Acock's Green (1918 - 1950) |
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| Birmingham, Deritend (1918 - 1950) |
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| Birmingham, Duddeston (1918 - 1950) |
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| Birmingham, Moseley (1918 - 1950) |
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| Birmingham West (1885 - 1950) |
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| Blackburn (1832 - 1950) |
Constituency of same name reformed 1955. |
| Bolton (1832 - 1950) |
Known as Bolton-le-Moors before 1832 |
| Bournemouth (1918 - 1950) |
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| Brighton (1832 - 1950) |
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| Bristol East (1885 - 1950) |
Constituency of same name reformed 1983. |
| Bristol North (1885 - 1950) |
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