National Health Action Party By-elections
| Election | Constituency | Candidate | Vote count | Vote share | Position |
| 20 October 2016 | Witney | Helen Salisbury | 433 | 1.1% | 6th |
| 28 February 2013 | Eastleigh | Iain Maclennan | 392 | 0.9% | 6th |
| Election | Constituency | Candidate | Vote count | Vote share | Position |
| 20 October 2016 | Witney | Helen Salisbury | 433 | 1.1% | 6th |
| 28 February 2013 | Eastleigh | Iain Maclennan | 392 | 0.9% | 6th |