| Isle of Wight East |
|
| Isle of Wight West |
|
| Islington Central |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Islington East |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Islington North |
|
| Islington South |
|
| Islington South and Finsbury |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Islington South West |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Islington West |
|
| Islwyn |
|
| Jarrow |
Full name (in Craig 2,3,4) Durham, Jarrow. Craig (4) 369 until 1955 revision |
| Jarrow and Gateshead East |
|
| Keighley |
Full name (in Craig 2,3) Yorkshire (West Riding), Keighley |
| Keighley and Ilkley |
|
| Kendal |
Full name (in Craig 2) Westmoreland, Kendal |
| Kenilworth and Southam |
|
| Kensington |
|
| Kensington |
|
| Kensington and Bayswater |
|
| Kensington and Chelsea |
|
| Kensington and Chelsea Chelsea |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Kensington and Chelsea Kensington |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Kensington North |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Kensington South |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Kent Eastern |
|