| Harrow Central |
|
| Harrow East |
|
| Harrow West |
|
| Hartlepool |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Hartlepools, The |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Harwich |
Full name (in Craig 2,3,4) Essex, Harwich |
| Harwich and North Essex |
|
| Hastings |
|
| Hastings and Rye |
|
| Havant |
|
| Havant and Waterloo |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Haverfordwest District of Boroughs |
|
| Havering Hornchurch |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Havering Upminster |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Hawick District of Burghs |
|
| Hayes and Harlington |
Constituency first used at the February General election of 1974 (28/02/1974). Constituency of same name reformed 1983. |
| Hayes and Harlington |
Constituency of same name also existed 1950-1974¹. |
| Hazel Grove |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Helston |
|
| Hemel Hempstead |
Constituency of same name also existed 1918-1983. |
| Hemel Hempstead |
Full name (in Craig 3,4) Hertfordshire, Hemel Hempstead. Constituency of same name reformed 1997. |
| Hemsworth |
Full name (in Craig 3,4) Yorkshire (West Riding), Hemsworth |
| Hendon |
Constituency of same name also existed 1918-1945. |
| Hendon |
Full name (in Craig 3) Middlesex, Hendon. Constituency of same name reformed 1997. |
| Hendon North |
Constituency of same name also existed 1945-1974¹. |