Caerdydd Penarth

Caerdydd Penarth (Welsh for 'Cardiff [and] Penarth'; ) is a six-member constituency of the Senedd (Welsh Parliament; Welsh: Senedd Cymru) to be used for the 2026 Senedd election. It would cover areas in the south-east of Wales, particularly parts of Cardiff, Rhondda Cynon Taf and the Vale of Glamorgan.

Source: Wikipedia

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Caerdydd Penarth

It was proposed following the 2026 review of Senedd constituencies, and will be a pairing of the two UK Parliament constituencies of Cardiff West and Cardiff South and Penarth. It is to have a Welsh-only name.

Boundaries

Caerdydd Penarth

A Senedd constituency comprising the boundaries of the UK Parliament constituencies of Cardiff West and Cardiff South and Penarth, has been proposed by the Democracy and Boundary Commission Cymru for the 2026 election to the Senedd (Welsh Parliament; Senedd Cymru). It was initially proposed using the English name Cardiff West, South and Penarth in September 2024. The pairing was then switched from Cardiff West to Cardiff East and renamed to Cardiff South-east Penarth, and its Welsh name being De-ddwyrain Caerdydd Penarth in December proposals, despite most other constituencies using Welsh-only names. It was later given the Welsh-only name Caerdydd Penarth and its boundaries were reverted back to using Cardiff West rather than Cardiff East in the commission's final recommendations in March 2025. When announcing their candidates, Reform UK used "Cardiff South-west Penarth" instead, based on the English names for the pair of UK Parliament constituencies that form it.

It encompasses parts of the principal areas (counties/county boroughs) of Cardiff, Rhondda Cynon Taf and the Vale of Glamorgan in South Wales. The constituency is to be established by 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.

Elections

Elections in the 2020s

<table><thead><tr><th>Party</th><th>Candidate</th><th>Votes</th><th>%</th><th>±%</th></tr></thead><tbody><tr><td></td><td>Communist</td><td>Robert Griffiths</td><td></td><td></td><td></td></tr><tr><td></td><td>Conservative</td><td>Calum Davies</td><td></td><td></td><td></td></tr><tr><td></td><td>Green</td><td>Anthony Slaughter Tessa Marshall</td><td></td><td></td><td></td></tr><tr><td></td><td>Heritage</td><td>Rhiannon Morrissey</td><td></td><td></td><td></td></tr><tr><td></td><td>Labour</td><td>Huw Thomas Ruba Sivanangam Peter Bradbury Steve Brooks Mutale Merrill Kanaya Singh Helen Gunter Laura Rochefort</td><td></td><td></td><td></td></tr><tr><td></td><td>Plaid Cymru</td><td>Anna Brychan Kiera Marshall Leticia Gonzalez Neil Roberts Malcolm Phillips Mathew Hawkins</td><td></td><td></td><td></td></tr><tr><td></td><td>Propel</td><td>Neil McEvoy</td><td></td><td></td><td></td></tr><tr><td></td><td>Reform UK</td><td>Joseph Martin Mark Reckless Robert Thomas</td><td></td><td></td><td></td></tr><tr><td>Majority</td><td></td><td></td><td></td></tr><tr><td>Turnout</td><td></td><td></td><td></td></tr><tr><td>Registered electors</td><td></td><td></td><td></td></tr><tr><td></td><td>win (new seat)</td></tr></tbody></table>

<table><thead><tr><th>2021 notional result</th></tr></thead><tbody><tr><td>Party</td><td>Vote</td><td>%</td><td>Seats</td></tr><tr><td></td><td>Labour</td><td>35,502</td><td>48.2</td><td>4</td></tr><tr><td></td><td>Conservative</td><td>14,210</td><td>19.3</td><td>1</td></tr><tr><td></td><td>Plaid Cymru</td><td>10,913</td><td>14.8</td><td>1</td></tr><tr><td></td><td>Propel</td><td>3,947</td><td>5.4</td><td>0</td></tr><tr><td></td><td>Liberal Democrats</td><td>3,083</td><td>4.2</td><td>0</td></tr><tr><td></td><td>Green</td><td>2,897</td><td>3.9</td><td>0</td></tr><tr><td></td><td>Abolish</td><td>1,466</td><td>2.0</td><td>0</td></tr><tr><td></td><td>Reform UK</td><td>490</td><td>0.7</td><td>0</td></tr><tr><td></td><td>UKIP</td><td>389</td><td>0.5</td><td>0</td></tr><tr><td></td><td>Independent</td><td>355</td><td>0.4</td><td>0</td></tr><tr><td></td><td>Freedom Alliance</td><td>237</td><td>0.3</td><td>0</td></tr><tr><td></td><td>Gwlad</td><td>110</td><td>0.1</td><td>0</td></tr><tr><td></td><td>Socialist (GB)</td><td>18</td><td>0.0</td><td>0</td></tr></tbody></table>