| Ilford |
|
| Ilford North |
|
| Ilford South |
|
| Ilkeston |
Full name (in Craig 2,3,4) Derbyshire, Ilkeston |
| Ince |
Full name (in Craig 2,3,4) Lancashire, Ince |
| Inverclyde |
|
| Inverclyde and Renfrewshire West |
|
| Inverness |
Full name (in Craig 3,4) Inverness-shire and Ross and Cromarty, Inverness |
| Inverness District of Burghs |
|
| Inverness East, Nairn and Lochaber |
|
| Inverness, Nairn and Lochaber |
|
| Inverness, Nairn, Badenoch and Strathspey |
|
| Inverness-shire |
|
| Inverness, Skye and West Ross-shire |
|
| Ipswich |
|
| Isle of Ely |
|
| Isle of Thanet |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 2,3,4) Kent, Isle of Thanet |
| Isle of Wight |
|
| 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). |