; ) is a six-member constituency of the Senedd (Welsh Parliament; ) used in the 2026 Senedd election. It covers southern Powys, the north of Neath Port Talbot, and eastern Swansea.
It was proposed following the 2026 review of Senedd constituencies, and is a pairing of the two UK Parliament constituencies of Brecon, Radnor and Cwm Tawe and Neath and Swansea East. It has a Welsh-only name.
Boundaries The constituency includes southern Powys, including Brecon, Llandrindod Wells, and Ystradgynlais. It also includes the north of Neath Port Talbot, including Neath, and the Swansea village of Clydach and the parts of the principal area east of the River Tawe, including St Thomas and Port Tennant.
A Senedd constituency comprising the boundaries of the UK Parliament constituencies of Brecon, Radnor and Cwm Tawe and Neath and Swansea East, has been proposed by the Democracy and Boundary Commission Cymru for the 2026 election to the Senedd (Welsh Parliament; ). It was initially proposed using the English name Brecon, Radnor, Neath and Swansea East in September 2024, but was renamed to South Powys Tawe Neath and its Welsh name being , in December proposals, despite most other constituencies using Welsh-only names. It was later given the Welsh-only name and its boundaries were confirmed in the commission's final recommendations in March 2025. When announcing their candidates, Reform UK used "Brecon, Radnor and Cwm Tawe, Neath and Swansea East" instead, using the English names for the pair of UK Parliament constituencies that form it.
The constituency was established in 2026, following the passing of the Senedd Cymru (Members and Elections) Act 2024. The act legislates electoral reform of the Senedd to create 16 larger "super constituencies", pairing the 32 UK Parliament constituencies in Wales, and using a new fully proportional voting system, with each constituency electing six Members of the Senedd (MSs) rather than one previously.
Members of the Senedd Term Election Distribution MS MS MS MS MS MS 7th 2026 2 1 3 James Evans(Ref) Sioned Williams(PC) Iain McIntosh(Ref) Rebeca Phillips(PC) Jane Dodds(Lib Dem) David Mills(Ref)
Elections Elections in the 2020s
2021 notional result Party Vote % Seats Labour 24,443 33.1 2 Conservative 19,190 26.0 2 Plaid Cymru 10,767 14.6 1 Liberal Democrats 9,939 13.5 1 Independent 2,944 4.0 0 Green 2,677 3.6 0 Abolish 2,234 3.0 0 Reform UK 717 1.0 0 Propel 436 0.6 0 UKIP 278 0.4 0 Gwlad 160 0.2 0
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References