| 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 |
| Arfon |
Full name (in Craig 2) Caernarvonshire, Arfon |
| Argyll |
|
| Argyll and Bute |
|
| Armagh [borough] |
|
| Armagh [county] |
Constituency of same name also existed 1832-1885. |
| Armagh [county] |
Constituency of same name also existed 1922-1983. |
| Armagh Mid |
|
| Armagh North |
|
| Armagh South |
|
| Arundel |
Constituency of same name also existed 1974ยน-1997. |
| Arundel |
Constituency of same name also existed 1832-1868. |
| Arundel and Shoreham |
Full name (in Craig 4) Sussex (West), Arundel and Shoreham |
| Arundel and South Downs |
|
| Ashburton |
Full name (in Craig 2) Devon, Ashburton |
| Ashfield |
Full name (in Craig 4) Nottinghamshire, Ashfield |
| Ashford |
Full name (in Craig 2,3,4) Kent, Ashford |