Wales, October 1974 vs 1979: seat-by-seat change
Every constituency in Wales compared between the October 1974 and 1979 general elections: which seats changed hands and how far each swung.
| Constituency | October 1974 | 1979 | Majority | Con–Lab swing |
|---|---|---|---|---|
| Aberavon | Lab | Lab | 37.0% | −4.5 |
| Aberdare | Lab | Lab | 54.3% | −0.9 |
| Abertillery | Lab | Lab | 59.8% | −3.7 |
| Anglesey | Lab | Con gain | 7.3% | −12.5 |
| Barry | Con | Con | 14.6% | −4.6 |
| Bedwellty | Lab | Lab | 50.6% | −4.2 |
| Brecon and Radnor | Lab | Con gain | 6.3% | −6.6 |
| Caernarvon | PC | PC | 24.9% | −8.3 |
| Caerphilly | Lab | Lab | 39.8% | −2.6 |
| Cardiff North | Con | Con | 11.2% | −2.5 |
| Cardiff North West | Con | Con | 17.8% | −2.6 |
| Cardiff South East | Lab | Lab | 21.6% | −2.4 |
| Cardiff West | Lab | Lab | 75.2% | +33.6 |
| Cardigan | Lib | Lib | 5.9% | −17.6 |
| Carmarthen | PC | Lab gain | 3.8% | −10.0 |
| Conway | Con | Con | 15.0% | −3.9 |
| Denbigh | Con | Con | 16.8% | −4.5 |
| East Flintshire | Lab | Lab | 10.3% | −3.6 |
| Ebbw Vale | Lab | Lab | 55.6% | −5.5 |
| Gower | Lab | Lab | 22.7% | −7.2 |
| Llanelli | Lab | Lab | 39.0% | −4.0 |
| Merioneth | PC | PC | 17.2% | −10.0 |
| Merthyr Tydfil | Lab | Lab | 57.2% | −2.4 |
| Monmouth | Con | Con | 14.7% | −5.4 |
| Montgomery | Lib | Con gain | 5.5% | −7.4 |
| Neath | Lab | Lab | 44.4% | −2.8 |
| Newport | Lab | Lab | 15.3% | −4.5 |
| Ogmore | Lab | Lab | 28.8% | −7.3 |
| Pembroke | Con | Con | 12.0% | −5.4 |
| Pontypool | Lab | Lab | 38.8% | −4.0 |
| Pontypridd | Lab | Lab | 26.8% | −4.7 |
| Rhondda | Lab | Lab | 62.2% | −3.7 |
| Swansea East | Lab | Lab | 46.5% | −1.5 |
| Swansea West | Lab | Lab | 0.8% | −4.6 |
| West Flint | Con | Con | 18.0% | −4.0 |
| Wrexham | Lab | Lab | 19.7% | −4.9 |
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