By-elections 2010 - 2015
| Constituency | Date | Result | Cause of election | Swing Lab=>Con |
| Rochester and Strood | 20/11/14 | UKIP GAIN | Resignation (defection to UKIP) | -1.4 |
| Heywood and Middelton | 09/10/14 | LAB HOLD | Death (Alcohol poisoning) | -7.9% |
| Clacton | 09/10/14 | UKIP GAIN | Resignation (defection to UKIP) | -7.3 |
| Newark | 05/06/14 | CON HOLD | Resignation (lobbying scandal) | -2.1% |
| Wythenshawe & Sale East | 13/02/14 | LAB HOLD | Death (brain haemorrhage) | -11.1% |
| South Shields | 02/05/13 | LAB HOLD | Resignation (Emmigration) | -4.3% |
| Mid Ulster | 07/03/13 | SF HOLD | Resignation (Ending dual hat) | n/a |
| Eastleigh | 28/02/13 | LDEM HOLD | Resignation (Criminal conviction) | -7.1% |
| Croydon North | 29/11/12 | LAB HOLD | Death (cancer) | -8.0% |
| Middlesbrough | 29/11/12 | LAB HOLD | Death (cancer) | -13.6% |
| Rotherham | 29/11/12 | LAB HOLD | Resignation (Expenses scandal) | -6.5% |
| Corby | 15/11/12 | LAB GAIN | Resignation (Emmigration) | -12.7% |
| Cardiff South and Penarth | 15/11/12 | LAB HOLD | Resignation (Police election) | -8.4% |
| Manchester Central | 15/11/12 | LAB HOLD | Resignation (Police election) | -11.9% |
| Bradford West | 29/03/12 | RES GAIN | Resignation (Ill health) | -1.2% |
| Feltham & Heston | 15/12/11 | LAB HOLD | Death (cancer) | -8.6% |
| Inverclyde | 30/06/11 | LAB HOLD | Death (pancreatitis) | +0.1% |
| Belfast West | 09/06/11 | SF HOLD | Resignation (Irish election) | n/a |
| Leicester South | 05/05/11 | LAB HOLD | Resignation (Mayoral election) | -9.3% |
| Barnsley Central | 05/03/11 | LAB HOLD | Resignation (Fraud conviction) | -11.3% |
| Oldham East & Saddleworth | 13/01/11 | LAB HOLD | Election Void on Petition | -11.9% |
