UK Polling History: By Elections
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| Constituency | Swing | Date | Parties | |||||||||||||||
| Conservative | Labour | Liberal Democrat |
SNP | DUP | Sinn Fein |
Plaid Cymru |
SDLP | Green | Reform UK |
Ulster Unionist |
Alliance (NI) |
UKIP | Brexit | |||||
| Constituency | Swing | Date | Parties | |||||||||||||||
| Conservative | Labour | Liberal Democrat |
SNP | DUP | Sinn Fein |
Plaid Cymru |
SDLP | Green | Reform UK |
Ulster Unionist |
Alliance (NI) |
UKIP | Brexit | |||||
| 1. | Blackpool South | 26.3% | L ← C | 02 May 2024 | 3,218 | 10,825 | 387 | 368 | 3,101 | |||||||||
| 2. | Rochdale | 24.2% | O ← L | 29 Feb 2024 | 3,731 | 2,402 | 2,164 | 436 | 1,968 | |||||||||
| 3. | Wellingborough | 28.5% | L ← C | 15 Feb 2024 | 7,408 | 13,844 | 1,422 | 1,020 | 3,919 | |||||||||
| 4. | Kingswood | 16.4% | L ← C | 15 Feb 2024 | 8,675 | 11,176 | 861 | 1,450 | 2,578 | 129 | ||||||||
| 5. | Mid Bedfordshire | 20.5% | L ← C | 19 Oct 2023 | 12,680 | 13,872 | 9,420 | 732 | 1,487 | |||||||||
| 6. | Tamworth | 23.9% | L ← C | 19 Oct 2023 | 10,403 | 11,719 | 417 | 417 | 1,373 | 436 | ||||||||
| 7. | Rutherglen and Hamilton West | 20.4% | L ← SNP | 05 Oct 2023 | 1,192 | 17,845 | 895 | 8,399 | 601 | 403 | ||||||||
| 8. | Uxbridge and South Ruislip | 6.7% | L ← C | 20 Jul 2023 | 13,965 | 13,470 | 526 | 893 | 61 | |||||||||
| 9. | Selby and Ainsty | 23.6% | L ← C | 20 Jul 2023 | 12,295 | 16,456 | 1,188 | 1,838 | 1,332 | |||||||||
| 10. | Somerton and Frome | 29.0% | LD ← C | 20 Jul 2023 | 10,179 | 1,009 | 21,187 | 3,944 | 1,303 | 275 | ||||||||
| 11. | West Lancashire | 10.5% | L ← C | 09 Feb 2023 | 5,742 | 14,068 | 918 | 646 | 994 | |||||||||
| 12. | Stretford and Urmston | 10.4% | L ← C | 15 Dec 2022 | 2,922 | 12,828 | 659 | 789 | 650 | |||||||||
| 13. | City of Chester | 13.6% | L ← C | 01 Dec 2022 | 6,335 | 17,309 | 2,368 | 987 | 773 | 179 | ||||||||
| 14. | Wakefield | 12.7% | L ← C | 23 Jun 2022 | 8,241 | 13,166 | 508 | 587 | 513 | 124 | ||||||||
| 15. | Tiverton and Honiton | 29.9% | LD ← C | 23 Jun 2022 | 16,393 | 1,562 | 22,537 | 1,064 | 481 | 241 | ||||||||
| 16. | Birmingham Erdington | 4.5% | L ← C | 03 Mar 2022 | 6,147 | 9,413 | 173 | 236 | 293 | |||||||||
| 17. | Southend West | 4.5% | C ← O | 03 Feb 2022 | 12,792 | 400 | ||||||||||||
| 18. | North Shropshire | 34.2% | LD ← C | 16 Dec 2021 | 12,032 | 3,686 | 17,957 | 1,738 | 1,427 | 378 | ||||||||
| 19. | Old Bexley and Sidcup | 10.2% | L ← C | 02 Dec 2021 | 11,189 | 6,711 | 647 | 830 | 1,432 | 184 | ||||||||
| 20. | Batley and Spen | 4.6% | O ← L | 01 Jul 2021 | 12,973 | 13,296 | 1,254 | 151 | ||||||||||
| 21. | Chesham and Amersham | 25.1% | LD ← C | 17 Jun 2021 | 13,489 | 622 | 21,517 | 1,480 | 414 | |||||||||
| 22. | Airdrie and Shotts | 5.5% | L ← C | 13 May 2021 | 2,812 | 8,372 | 220 | 10,129 | 45 | 39 | ||||||||
| 23. | Hartlepool | 16.0% | C ← L | 06 May 2021 | 15,529 | 8,589 | 349 | 358 | 368 | |||||||||
| 24. | Brecon and Radnor | 13.4% | LD ← L | 01 Aug 2019 | 12,401 | 1,680 | 13,826 | 242 | 3,331 | |||||||||
| 25. | Peterborough | 17.2% | LD ← C | 06 Jun 2019 | 7,243 | 10,484 | 4,159 | 1,035 | 400 | 9,801 | ||||||||
| 26. | Newport West | 9.8% | O ← L | 04 Apr 2019 | 7,357 | 9,308 | 1,088 | 1,185 | 924 | 2,023 | ||||||||
| 27. | Lewisham East | 19.0% | LD ← L | 14 Jun 2018 | 3,161 | 11,033 | 5,404 | 788 | 380 | |||||||||
| 28. | West Tyrone | 4.6% | SDLP ← SF | 03 May 2018 | 8,390 | 16,346 | 6,254 | 2,909 | 1,130 | |||||||||
| 29. | Copeland | 8.7% | C ← UKIP | 23 Feb 2017 | 13,748 | 11,601 | 2,252 | 515 | 2,025 | |||||||||
| 30. | Stoke-on-Trent Central | 4.0% | LD ← L | 23 Feb 2017 | 5,154 | 7,853 | 2,083 | 294 | 5,233 | |||||||||
| 31. | Sleaford and North Hykeham | 6.2% | LD ← L | 08 Dec 2016 | 17,570 | 3,363 | 3,606 | 4,426 | ||||||||||
| 32. | Richmond Park | 19.5% | LD ← L | 01 Dec 2016 | 1,515 | 20,510 | ||||||||||||
| 33. | Batley and Spen | 19.4% | L ← O | 20 Oct 2016 | 17,506 | |||||||||||||
| 34. | Witney | 19.3% | LD ← C | 20 Oct 2016 | 17,313 | 5,765 | 11,611 | 1,363 | 1,354 | |||||||||
| 35. | Tooting | 7.3% | L ← C | 16 Jun 2016 | 11,537 | 17,894 | 820 | 830 | 507 | |||||||||
| 36. | Sheffield Brightside and Hillsborough | 5.6% | L ← C | 05 May 2016 | 1,267 | 14,087 | 1,385 | 938 | 4,497 | |||||||||
| 37. | Ogmore | 4.5% | PC ← C | 05 May 2016 | 2,956 | 12,383 | 702 | 3,683 | 3,808 | |||||||||
| 38. | Oldham West and Royton | 8.5% | L ← C | 03 Dec 2015 | 2,596 | 17,209 | 1,024 | 249 | 6,487 | |||||||||
| 39. | Rochester and Strood | 9.0% | G ← LD | 20 Nov 2014 | 13,947 | 6,713 | 349 | 1,692 | 16,867 | |||||||||
| 40. | Clacton | 14.7% | O ← C | 09 Oct 2014 | 8,709 | 3,957 | 483 | 688 | 21,113 | |||||||||
| 41. | Heywood and Middleton | 26.8% | UKIP ← LD | 09 Oct 2014 | 3,496 | 11,633 | 1,457 | 870 | 11,016 | |||||||||
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