| Barnsley South |
|
| Barnsley West and Penistone |
|
| Barnstaple |
Full name (in Craig 2,3) Devon, Barnstaple |
| Barons Court |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Barrow and Furness |
|
| Barrow-in-Furness |
|
| Barry |
Full name (in Craig 4) Glamorganshire, Barry |
| Basildon |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Basildon and Billericay |
|
| Basildon South and East Thurrock |
Successor to Basildon |
| Basingstoke |
Full name (in Craig 2,3,4) Hampshire, Basingstoke |
| Bassetlaw |
Full name (in Craig 2,3,4) Nottinghamshire, Bassetlaw |
| Bath |
|
| Bathgate and Linlithgow |
|
| Batley and Morley |
|
| Batley and Spen |
|
| Battersea |
|
| Battersea and Clapham, Battersea |
|
| Battersea and Clapham, Clapham |
|
| Battersea North |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Battersea South |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Beaconsfield |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Beaumaris District of Boroughs |
|
| Bebington |
Constituency first used at the February General election of 1974 (28/02/1974). |
| Bebington and Ellesmere Port |
Constituency first used at the February General election of 1974 (28/02/1974). |