Gareth Thomas Elections won
Parliament Member page for Gareth Thomas
Elections listed as contested and won are those forming part of the general elections in 2010, 2015, 2017, 2019 or 2024 and any by-election contested during the 57th and 58th Parliaments. A person may have contested and won an election outside this grouping.
| Election | Constituency | Election type | Party | Vote count | Vote share | Majority |
| 4 July 2024 | Harrow West | General election | Lab / Co-op | 19,833 | 43.8% | 6,642 |
| 12 December 2019 | Harrow West | General election | Lab / Co-op | 25,132 | 52.4% | 8,692 |
| 8 June 2017 | Harrow West | General election | Lab / Co-op | 30,640 | 60.8% | 13,314 |
| 7 May 2015 | Harrow West | General election | Lab / Co-op | 21,885 | 47.0% | 2,208 |
| 6 May 2010 | Harrow West | General election | Lab / Co-op | 20,111 | 43.6% | 3,143 |