1918 General Election - Peterborough
| Year | 1918 |
| General election | 1918 General Election |
| Constituency | Peterborough |
| Turnout | 62.2% |
Results
| Candidate | Party | Votes |
| Brassey, Henry Leonard Campbell | Unionist with Coalition Coupon | 9,516 |
| Mansfield, John | Labour | 8,832 |
| Slater, Thomas Ivatt | Liberal | 3,214 |