| Alloa and Grangemouth |
|
| Altrincham |
Full name (in Craig 2,3) Cheshire, Altrincham |
| Altrincham and Sale |
|
| Altrincham and Sale West |
|
| Alyn and Deeside |
|
| Amber Valley |
|
| Andover |
Full name (in Craig 2) Hampshire, Andover |
| Anglesey |
Renamed Ynys Mon 1983 |
| Angus |
|
| Angus and Perthshire Glens |
|
| Angus East |
|
| Angus North and Mearns |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Angus South |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Antrim |
Constituency of same name also existed 1922-1950. |
| Antrim |
Constituency of same name also existed 1832-1885. |
| Antrim East |
Constituency of same name continued after 1922 |
| Antrim East |
Constituency of same name also existed 1885-1922. |
| Antrim Mid |
|
| Antrim North |
Constituency of same name continued after 1922 |
| Antrim North |
Constituency of same name also existed 1885-1922. |
| Antrim South |
Constituency of same name continued after 1922 |
| Antrim South |
Constituency of same name also existed 1885-1922. |
| Appleby |
Full name (in Craig 2) Westmoreland, Appleby |
| Arbroath and Broughty Ferry |
|
| Arfon |
Full name (in Craig 2) Caernarvonshire, Arfon |