| Melton |
Full name (in Craig 2,3,4) Leicestershire, Melton |
| Melton and Syston |
|
| Meon Valley |
This seat has been formed by the Boundary Commission for England as an extra constituency in Hampshire |
| Meriden |
Full name (in Craig 4) Warwickshire, Meriden |
| Meriden and Solihull East |
|
| Merioneth |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Merionethshire |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Merthyr Tydfil |
Constituency of same name also existed 1832-1918. |
| Merthyr Tydfil |
Constituency of same name also existed 1950-1983. |
| Merthyr Tydfil Aberdare |
|
| Merthyr Tydfil and Aberdare |
Welsh name: Merthyr Tydfil ac Aberdâr. |
| Merthyr Tydfil and Rhymney |
|
| Merthyr Tydfil Merthyr |
|
| Merton and Morden |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Merton Mitcham and Morden |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Mid and South Pembrokeshire |
Welsh name: Canol a De Sir Benfro. |
| Mid Buckinghamshire |
|
| Mid Cheshire |
|
| Middlesbrough |
Seat of same name existed 1832-1918. |
| Middlesbrough |
Seat of same name reformed 1983. |
| Middlesbrough and Thornaby East |
|
| Middlesbrough East |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Middlesbrough South and Cleveland East |
|
| Middlesbrough West |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Middlesex |
|