I'm sure I'm missing a few seats but I can't quite figure what they are. England and Wales only here.
| Lab to Con (9) | Con to Lab (10) | LD to Con (27) | LD to Lab (12) |
| Plymouth Moorview | Hove | St Ives | Bristol West |
| Southampton Itchen | Brentford and Isleworth | Cornwall North | Norwich South |
| Gower | Enfield North | St Austell and Newquay | Cambridge |
| Vale of Clwyd | Ealing Central and Acton | Devon North | Birmingham Yardley |
| Telford | Ilford North | Torbay | Manchester Withington |
| Morley and Outwood | City of Chester | Taunton Deane | Burnley |
| Bolton West | Wirral West | Yeovil | Cardiff Central |
| Derby North | Lancaster and Fleetwood | Dorset Mid and Poole North | Redcar |
| Corby (by-election) | Wolverhampton SW | Eastleigh | Bermondsey and Old Southwark |
| Dewsbury | Somerton and Frome | Brent Central |
| | Wells | Hornsey and Wood Green |
| | Bath | Bradford East |
| | Chippenham | |
| | Thornbury and Yate | |
| | Cheltenham | |
| | Lewes | |
| UKIP to Con (1) | Respect to Lab (1) | Eastbourne | |
| Rochester and Strood (by-election) | Bradford West (by-election) | Portsmouth South | |
| | Colchester | |
| | Solihull | |
| | Cheadle | |
| | Hazel Grove | |
| | Brecon and Radnorshire | |
| | Berwick-upon-Tweed | |
| | Twickenham | |
| | Sutton and Cheam | |
| | Kingston and Surbiton | |
| | | |
| | | |
| | | |
| | | |
