1970 General Election - Blackburn
| Year | 1970 |
| General election | 1970 General Election |
| Constituency | Blackburn |
| Turnout | 75.5% |
Results
| Candidate | Party | Votes |
| Castle, Barbara | Labour | 22,473 |
| Gardner, Trixie | Conservative | 19,737 |
| Year | 1970 |
| General election | 1970 General Election |
| Constituency | Blackburn |
| Turnout | 75.5% |
| Candidate | Party | Votes |
| Castle, Barbara | Labour | 22,473 |
| Gardner, Trixie | Conservative | 19,737 |