| Lambeth Central (1974 - 1983) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Lambeth Streatham (1974 - 1983) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Leicester East (1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Constituency of same name also existed 1918-1950. |
| Leicester South (1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Seat of same name existed 1918-1950 |
| Leicester West (1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Constituency of same name also existed 1918-1950 |
| Lewisham, Deptford (1974 - 2024) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Lewisham East (1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Constituency of same name also existed 1918-1950. |
| Liverpool, Scotland Exchange (1974 - 1983) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Luton East (1974 - 1983) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Luton West (1974 - 1983) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Manchester Central (1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Merioneth (1974 - 1983) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Merton Mitcham and Morden (1974 - 1983) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Montgomery (1974 - 1997) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Moray and Nairn (1974 - 1983) |
Constituency first used at the February General election of 1974 (28/02/1974). Probably not a true founding in 1974 - may be simply a difference of nomenclature between Craig and Times HoC sources. See also Moray and Nairnshire (1918-1974ยน). |
| Motherwell and Wishaw (1974 - 2024) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Newham North East (1974 - 1997) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Newham North West (1974 - 1997) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Newham South (1974 - 1997) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Norfolk North West (1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Northampton North (1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Northampton South (1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Nottingham East (1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Constituency of same name also existed 1885-1955. |
| Oxon Mid (1974 - 1983) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Pembroke (1974 - 1997) |
Constituency first used at the February General election of 1974 (28/02/1974). |