1970 General Election - Preston South
| Year | 1970 |
| General election | 1970 General Election |
| Constituency | Preston South |
| Turnout | 75.8% |
Results
| Candidate | Party | Votes |
| Green, Alan | Conservative | 20,480 |
| Mahon, Peter | Labour | 19,149 |
| Year | 1970 |
| General election | 1970 General Election |
| Constituency | Preston South |
| Turnout | 75.8% |
| Candidate | Party | Votes |
| Green, Alan | Conservative | 20,480 |
| Mahon, Peter | Labour | 19,149 |