Wales, 1983 vs 1987: seat-by-seat change
Every constituency in Wales compared between the 1983 and 1987 general elections: which seats changed hands and how far each swung.
| Constituency | 1983 | 1987 | Majority | Con–Lab swing |
|---|---|---|---|---|
| Aberavon | Lab | Lab | 50.7% | +5.0 |
| Alyn and Deeside | Lab | Lab | 13.5% | +5.2 |
| Blaenau Gwent | Lab | Lab | 64.4% | +2.8 |
| Brecon and Radnor | Con | Alliance gain | 0.1% | +8.9 |
| Bridgend | Con | Lab gain | 9.5% | +6.4 |
| Caernarfon | PC | PC | 36.0% | −1.8 |
| Caerphilly | Lab | Lab | 39.0% | +6.5 |
| Cardiff Central | Con | Con | 4.8% | +6.2 |
| Cardiff North | Con | Con | 18.6% | +4.3 |
| Cardiff South and Penarth | Lab | Lab | 10.2% | +2.4 |
| Cardiff West | Con | Lab gain | 9.1% | +6.7 |
| Carmarthen | Lab | Lab | 8.0% | +2.9 |
| Ceredigion and Pembroke North | Alliance | Alliance | 9.7% | +3.5 |
| Clwyd North West | Con | Con | 23.7% | +5.5 |
| Clwyd South West | Con | Lab gain | 2.2% | +4.3 |
| Conwy | Con | Con | 7.4% | +4.1 |
| Cynon Valley | Lab | Lab | 56.7% | +7.5 |
| Delyn | Con | Con | 2.3% | +4.9 |
| Gower | Lab | Lab | 12.1% | +4.7 |
| Islwyn | Lab | Lab | 56.6% | +5.7 |
| Llanelli | Lab | Lab | 42.0% | +6.9 |
| Meirionnydd Nant Conwy | PC | PC | 11.7% | +1.0 |
| Merthyr Tydfil and Rhymney | Lab | Lab | 63.5% | +4.4 |
| Monmouth | Con | Con | 19.9% | +3.8 |
| Montgomery | Alliance | Alliance | 8.1% | +2.2 |
| Neath | Lab | Lab | 47.2% | +5.5 |
| Newport East | Lab | Lab | 16.9% | +5.2 |
| Newport West | Con | Lab gain | 6.0% | +3.7 |
| Ogmore | Lab | Lab | 54.3% | +4.9 |
| Pembroke | Con | Con | 10.0% | +3.8 |
| Pontypridd | Lab | Lab | 36.8% | +7.1 |
| Rhondda | Lab | Lab | 64.4% | +6.2 |
| Swansea East | Lab | Lab | 44.8% | +5.1 |
| Swansea West | Lab | Lab | 15.5% | +5.0 |
| Torfaen | Lab | Lab | 38.8% | +7.3 |
| Vale of Glamorgan | Con | Con | 12.1% | +5.1 |
| Wrexham | Lab | Lab | 8.2% | +3.7 |
| Ynys Mon | Con | PC gain | 10.0% | +2.1 |
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