| Acton (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 3) Middlesex, Acton |
| Arundel and Shoreham (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 4) Sussex (West), Arundel and Shoreham |
| Barnet (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 3,4) Hertfordshire, Barnet |
| Barons Court (1955 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Battersea North (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Battersea South (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bebington (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bermondsey (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Berwickshire and East Lothian (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Slight change of name rather than true revision in 1974 - see Berwick and East Lothian. |
| Bethnal Green (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bexley (1945 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bilston (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Birmingham, All Saints (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Birmingham, Aston (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Birmingham, King's Norton (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bournemouth East and Christchurch (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bradford East (1885 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Breconshire and Radnorshire (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Brentford and Chiswick (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 3) Middlesex, Brentford and Chiswick |
| Brierley Hill (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 4) Staffordshire, Brierley Hill |
| Brigg (1885 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 2,3,4) Lincolnshire and Rutlandshire (parts of Lindsey), Brigg |
| Bristol Central (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bromley (1918 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Buckinghamshire South (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bute and North Ayrshire (1950 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 4) Ayrshire and Bute, Bute and North Ayrshire |