Wales, 2010 vs 2015: seat-by-seat change
Every constituency in Wales compared between the 2010 and 2015 general elections: which seats changed hands and how far each swung.
| Constituency | 2010 | 2015 | Majority | Con–Lab swing |
|---|---|---|---|---|
| Aberavon | Lab | Lab | 33.1% | −0.3 |
| Aberconwy | Con | Con | 13.3% | −1.0 |
| Alyn and Deeside | Lab | Lab | 8.1% | +0.4 |
| Arfon | PC | PC | 13.7% | +1.8 |
| Blaenau Gwent | Lab | Lab | 40.1% | +0.9 |
| Brecon and Radnorshire | LD | Con gain | 12.7% | −0.2 |
| Bridgend | Lab | Lab | 4.9% | −0.5 |
| Caerphilly | Lab | Lab | 25.0% | 0 |
| Cardiff Central | LD | Lab gain | 12.9% | +9.1 |
| Cardiff North | Con | Con | 4.2% | −1.9 |
| Cardiff South and Penarth | Lab | Lab | 16.0% | +2.7 |
| Cardiff West | Lab | Lab | 15.5% | +2.0 |
| Carmarthen East and Dinefwr | PC | PC | 14.2% | −0.5 |
| Carmarthen West and South Pembrokeshire | Con | Con | 15.0% | −3.3 |
| Ceredigion | LD | LD | 8.2% | +2.2 |
| Clwyd South | Lab | Lab | 6.9% | −0.7 |
| Clwyd West | Con | Con | 17.7% | −0.4 |
| Cynon Valley | Lab | Lab | 30.9% | −3.4 |
| Delyn | Lab | Lab | 7.8% | +0.8 |
| Dwyfor Meirionnydd | PC | PC | 18.2% | −0.4 |
| Gower | Lab | Con gain | 0.1% | −3.3 |
| Islwyn | Lab | Lab | 29.4% | −0.7 |
| Llanelli | Lab | Lab | 18.4% | −0.6 |
| Merthyr Tydfil and Rhymney | Lab | Lab | 35.2% | +3.8 |
| Monmouth | Con | Con | 23.1% | −0.4 |
| Montgomeryshire | Con | Con | 15.8% | −2.6 |
| Neath | Lab | Lab | 25.7% | −2.4 |
| Newport East | Lab | Lab | 13.4% | −0.3 |
| Newport West | Lab | Lab | 8.7% | −0.1 |
| Ogmore | Lab | Lab | 37.0% | −0.6 |
| Pontypridd | Lab | Lab | 23.7% | +0.6 |
| Preseli Pembrokeshire | Con | Con | 12.3% | −0.3 |
| Rhondda | Lab | Lab | 23.6% | −2.5 |
| Swansea East | Lab | Lab | 35.8% | +0.5 |
| Swansea West | Lab | Lab | 20.0% | +3.1 |
| Torfaen | Lab | Lab | 21.5% | −1.6 |
| Vale of Clwyd | Lab | Con gain | 0.7% | −3.9 |
| Vale of Glamorgan | Con | Con | 13.4% | −2.3 |
| Wrexham | Lab | Lab | 5.6% | −2.9 |
| Ynys Môn | Lab | Lab | 0.7% | −0.5 |
Official results House of Commons Library and UK Parliament election results data. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. How we use this data