Cardiff South and Penarth (Welsh: De Caerdydd a Phenarth) is a constituency created in 1983 represented in the House of Commons of the UK Parliament since 2012 by Stephen Doughty, a Labour Co-opMP.[n 1] It was the largest constituency in Wales, with an electorate of 75,175 and one of the most ethnically diverse.[4]
Prior to 1983 Penarth had been part of the abolished Barry constituency, represented by the Conservative backbencher Sir Raymond Gower. Most of the electorate of the new constituency had previously fallen into the abolished seat of Cardiff South East, represented by former Prime Minister, James Callaghan.
Its boundaries remained unchanged until the 2010 redistribution, when Sully was added to this constituency from the Vale of Glamorgan seat.
The second MP was Alun Michael (Labour and Co-operative Party) who served 25 years from 1987 before choosing to stand down in 2012. Michael's affiliation with the Co-operative Party did not appear on ballot papers at the 2010 general election because the Electoral Commission ruled that any joint candidates who wanted the names of both their parties included on the ballot paper could not also display the Labour red rose logo.[6] Michael opted to drop the reference to the Co-operative Party but after the election denounced the ruling as "an outrageous piece of incompetence by the Electoral Commission".[7] Michael briefly became Secretary of State for Wales in 1998. Michael held the seat at the 2010 general election with a majority of 10.6% following a 6% swing to the Conservative candidate.[8]
At a by-election held on 15 November 2012, Labour's decline was reversed coupled with very low turnout (down 38.2% on the previous election). Labour's Stephen Doughty succeeded Alun Michael winning 47.3% of the overall vote. This was an increase (in share-of-the-vote terms) on Michael's 2010 performance. However, in terms of actual votes cast (9,193 compared with 17,262 in 2010), it was Labour's lowest in this constituency. The 2015 result gave the seat the 83rd-smallest majority of Labour's 232 seats by percentage of majority.[11] Labour's result in 2017 saw them secure their largest ever margin in the constituency in terms of raw votes.
Other parties
Five parties' candidates achieved more than the deposit-retaining threshold of 5% of the vote in 2015. The second-placed candidate has been a Conservative candidate since the seat was formed. The closest result was in 1983, when Callaghan won by 5.5% of the vote.
Turnout
Turnout at general elections has ranged between 77.2% in 1992 and 56.2% in 2005.
2010–2024: The Cardiff electoral divisions of Butetown, Grangetown, Llanrumney, Rumney, Splott, and Trowbridge, and the Vale of Glamorgan County Borough electoral divisions of Cornerswell, Dinas Powys (from 2024), Llandough, Plymouth, St Augustine's, Stanwell, and Sully.
^Plaid Cymru withdrew their support for Rahman on 7 June 2024, after nominations closed the same day, so she still appeared as the Plaid Cymru candidate on the ballot paper.[49]
^ abcd"Cardiff South and Penarth result". Election results for Cardiff South and Penarth. City of Cardiff Council. 2 October 2014. Retrieved 18 January 2020.
^ abcd"Cardiff South and Penarth result". Election results for Cardiff South and Penarth. City of Cardiff Council. 7 May 2015. Retrieved 21 September 2015.