| Belfast South (1885 - 1918) |
Constituency of same name reformed 1922. |
| Belfast West (1885 - 1918) |
Constituency of same name reformed 1922. |
| Bethnal Green North East (1885 - 1950) |
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| Bethnal Green South West (1885 - 1950) |
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| Biggleswade (1885 - 1918) |
Full name (in Craig 2) Bedfordshire, Biggleswade |
| Birmingham, Bordesley (1885 - 1918) |
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| Birmingham Central (1885 - 1918) |
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| Birmingham East (1885 - 1918) |
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| Birmingham, Edgbaston (1885) |
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| Birmingham North (1885 - 1918) |
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| Birmingham South (1885 - 1918) |
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| Birmingham West (1885 - 1950) |
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| Bishop Auckland (1885) |
Full name (in Craig 2,3,4) Durham, Bishop Auckland |
| Blackpool (1885 - 1945) |
Full name (in Craig 2) Lancashire, Blackpool |
| Bootle (1885) |
Full name (in Craig 2) Lancashire, Bootle |
| Bosworth (1885 - 2024) |
Full name (in Craig 2,3,4) Leicestershire, Bosworth |
| Bradford Central (1885 - 1955) |
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| Bradford East (1885 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bradford West (1885 - 1918) |
Consituency of same name reformed in 1955. |
| Brentford (1885 - 1918) |
Full name (in Craig 2) Middlesex, Brentford |
| Bridgwater (1885 - 2010) |
Full name (in Craig 2,3,4) Somerset, Bridgwater. Constituency of same name also existed 1832-1870. |
| Brigg (1885 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 2,3,4) Lincolnshire and Rutlandshire (parts of Lindsey), Brigg |
| Bristol East (1885 - 1950) |
Constituency of same name reformed 1983. |
| Bristol North (1885 - 1950) |
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| Bristol South (1885) |
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