| Lancashire Northern |
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| Lancashire South Eastern |
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| Lancashire Southern |
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| Lancashire South Western |
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| Lancashire West |
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| Lancaster |
Disenfranchised for corruption after 1865 General Election. Constituency of same name also existed 1885-1997. |
| Lancaster |
Full name (in Craig 2,3,4) Lancashire, Lancaster. Constituency of same name also existed 1832-1868. |
| Lancaster and Fleetwood |
Replaced Lancaster and Wyre, following creation of Wyre and Preston North |
| Lancaster and Wyre |
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| Langbaurgh |
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| Launceston |
Full name (in Craig 2) Cornwall, Launceston |
| Leeds |
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| Leeds Central |
Constituency of same name also existed 1885-1955. |
| Leeds Central |
Constituency of same name reformed in 1983. |
| Leeds East |
Constituency of same name reformed 1955. |
| Leeds East |
Constituency of same name also existed 1885-1918. |
| Leeds North |
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| Leeds North East |
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| Leeds North West |
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| Leeds South |
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