| Berkshire (1832 - 1885) |
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| Berwickshire (1832 - 1918) |
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| Berwick-upon-Tweed (1832 - 2024) |
Full name (in Craig 2,3,4) Northumberland, Berwick-upon-Tweed |
| Beverley (1832 - 1870) |
Disfranchised for corruption, 1870, and incorporated into Yorkshire (East Riding). Constituency of same name also existed 1950-1955 and 1983-1997. |
| Bewdley (1832 - 1950) |
Full name (in Craig 2,3) Worcestershire, Bewdley |
| Birmingham (1832 - 1885) |
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| Blackburn (1832 - 1950) |
Constituency of same name reformed 1955. |
| Bodmin (1832 - 1983) |
Full name (in Craig 2,3,4) Cornwall, Bodmin |
| Bolton (1832 - 1950) |
Known as Bolton-le-Moors before 1832 |
| Boston (1832 - 1918) |
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| Bradford (1832 - 1885) |
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| Brecon (1832 - 1885) |
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| Breconshire (1832 - 1918) |
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| Bridgnorth (1832 - 1885) |
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| Bridgwater (1832 - 1870) |
Disenfranchised for corruption in 1870. Constituency of same name reformed 1885. |
| Bridport (1832 - 1885) |
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| Brighton (1832 - 1950) |
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| Bristol (1832 - 1885) |
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| Buckingham (1832 - 2024) |
Full name (in Craig 2,3,4) Buckinghamshire, Buckingham |
| Buckinghamshire (1832 - 1885) |
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| Bury (1832 - 1950) |
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| Bury St Edmunds (1832 - 2024) |
Full name (in Craig 3,4) Suffolk, Bury St Edmunds |
| Buteshire (1832 - 1918) |
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| Caernarvon District of Boroughs (1832 - 1950) |
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| Caernarvonshire (1832 - 1885) |
Constituency of same name also existed 1918-1950. |