Brecon, Radnor and Cwm Tawe (UK Parliament constituency)

Brecon, Radnor and Cwm Tawe (Aberhonddu, Maesyfed a Chwm Tawe) is a constituency of the House of Commons in the UK Parliament, first contested at the 2024 United Kingdom general election, following the 2023 Periodic Review of Westminster constituencies.

The constituency name refers to the historic counties of Breconshire and Radnorshire as well as the Swansea Valley, known as Cwm Tawe in Welsh.

Geography
The seat covers the large rural traditional counties of Brecknockshire and Radnorshire (currently administered as part of the unitary authority of Powys) as well as the town of Pontardawe in Neath Port Talbot County Borough.

Boundaries
The constituency will comprise the following areas:


 * From the County of Powys: Aber-craf, Beguildy, Bronllys, Builth, Bwlch, Crickhowell, Cwm-twrch, Disserth and Trecoed, Felin-fâch, Glasbury, Gwernyfed, Hay, Knighton, Llanafanfawr, Llanbadarn Fawr, Llandrindod East/Llandrindod West, Llandrindod North, Llandrindod South, Llanelwedd, Llangattock, Llangors, Llangunllo, Llangynidr, Llanwrtyd Wells, Llanyre, Maescar/Llywel, Nantmel, Old Radnor, Presteigne, Rhayader, St. David Within, St. John, St. Mary, Talgarth, Talybont-on-Usk, Tawe-Uchaf, Ynyscedwyn, Yscir, and Ystradgynlais;
 * From the County of Neath Port Talbot: Allt-wen, Cwmllynfell, Godre’r Graig, Gwaun-Cae-Gurwen, Lower Brynamman, Pontardawe, Rhos, Trebanos, and Ystalyfera.