| Aberdeen and Glasgow Universities (1868 - 1918) |
Non-geographic constituency. |
| Aberdeenshire Eastern (1868 - 1918) |
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| Aberdeenshire Western (1868 - 1918) |
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| Andover (1832 - 1918) |
Full name (in Craig 2) Hampshire, Andover |
| Appleby (1885 - 1918) |
Full name (in Craig 2) Westmoreland, Appleby |
| Arfon (1885 - 1918) |
Full name (in Craig 2) Caernarvonshire, Arfon |
| Ashburton (1832 - 1918) |
Full name (in Craig 2) Devon, Ashburton |
| Aston Manor (1885 - 1918) |
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| Ayrshire Northern (1868 - 1918) |
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| Ayrshire Southern (1868 - 1918) |
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| Battersea and Clapham, Battersea (1885 - 1918) |
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| Battersea and Clapham, Clapham (1885 - 1918) |
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| Belfast East (1885 - 1918) |
Constituency of same name reformed 1922 |
| Belfast North (1885 - 1918) |
Constituency of same name reformed 1922 |
| Belfast South (1885 - 1918) |
Constituency of same name reformed 1922. |
| Belfast West (1885 - 1918) |
Constituency of same name reformed 1922. |
| Berwickshire (1832 - 1918) |
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| Biggleswade (1885 - 1918) |
Full name (in Craig 2) Bedfordshire, Biggleswade |
| Birkenhead (1861 - 1918) |
Formed in 1861 with by-election. Constituency of same name reformed 1950. |
| 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 North (1885 - 1918) |
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| Birmingham South (1885 - 1918) |
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| Boston (1832 - 1918) |
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