Communist League Election Campaign By-elections
| Election | Constituency | Candidate | Vote count | Vote share | Position |
| 8 October 2026 | Holborn and St Pancras | Jonathan Silberman | 9 | 0.0% | 14th |
| 26 February 2026 | Gorton and Denton | Hugo Wils | 29 | 0.1% | 11th |
| 15 November 2012 | Manchester Central | Peter Clifford | 64 | 0.4% | 12th |