| Montgomeryshire (1832 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Constituency of same name reformed 1997. |
| Moray and Nairnshire (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Probably not a true disbandment in 1974 - may be simply a difference of nomenclature between Craig and Times HoC sources. See also Moray and Nairn (1974ยน-1983). |
| Motherwell (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 3,4) Lanarkshire, Motherwell |
| Norfolk Central (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Northampton (1832 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Northamptonshire South (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 4) Northamptonshire (and the Soke of Peterborough), South |
| North Angus and Mearns (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 4) Aberdeenshire and Kincardineshire, North Angus and Mearns |
| Nottingham Central (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Nottingham South (1885 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Constituency of same name reformed 1983. |
| Oldbury and Halesowen (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Orpington (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 3,4) Kent, Orpington. Constituency of same name reformed 1983. |
| Paddington North (1885 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Paddington South (1885 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Pembrokeshire (1832 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Pontefract (1832 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 3) Yorkshire (West Riding), Pontefract |
| Poplar (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Portsmouth Langstone (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Portsmouth West (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Reading (1955 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Constituency of same name also existed 1832-1950. |
| Reigate (1885 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 2,3,4) Surrey, Reigate. Constituency of same name also existed 1832-1868, and another of the same name reformed 1983. |
| Rhondda East (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Rhondda West (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Richmond (Surrey) (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Rowley Regis and Tipton (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Roxburghshire and Selkirkshire (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |