| Heywood and Middleton North |
|
| Heywood and Radcliffe |
Full name (in Craig 3) Lancashire, Heywood and Radcliffe |
| Heywood and Royton |
Full name (in Craig 4) Lancashire, Heywood and Royton |
| High Peak |
Full name (in Craig 2,3,4) Derbyshire, High Peak |
| Hillingdon Hayes and Harlington |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Hillingdon Ruislip Northwood |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Hillingdon Uxbridge |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Hinckley and Bosworth |
|
| Hitchin |
Full name (in Craig 2,3,4) Hertfordshire, Hitchin |
| Hitchin |
|
| Hitchin and Harpenden |
|
| Holborn |
|
| Holborn and St Pancras |
|
| Holborn and St Pancras South |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Holderness |
Full name (in Craig 2,3) Yorkshire (East Riding), Holderness |
| Holland with Boston |
Full name (in Craig 3,4) Lincolnshire and Rutlandshire (parts of Holland), Holland with Boston |
| Holmfirth |
Full name (in Craig 2) Yorkshire (West Riding), Holmfirth |
| Honiton |
Full name (in Craig 2,3,4) Devon, Honiton. Constituency of same name existed 1832-1868. |
| Honiton |
Disenfranchised 1868. Constituency of same name existed 1885- |
| Honiton and Sidmouth |
|
| Horncastle |
Full name (in Craig 2,3,4) Lincolnshire and Rutlandshire (parts of Lindsey), Horncastle |
| Hornchurch |
Full name (in Craig 3) Essex, Hornchurch |
| Hornchurch and Upminster |
|
| Hornsey |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 2) Middlesex, Hornsey |
| Hornsey and Friern Barnet |
|