1979 General Election - Preston South
| Year | 1979 |
| General election | 1979 General Election |
| Constituency | Preston South |
| Turnout | 77.2% |
Results
| Candidate | Party | Votes |
| Thorne, Stan | Labour | 17,810 |
| Tetlow, Brian | Conservative | 17,189 |
| Marshall, Ron | Liberal | 4,625 |
| Gibson, M | National Front | 258 |
| Stephens, VA | Workers Revolutionary | 116 |