Frequently Asked Questions — Cardiff South and Penarth Constituency

Who won the Cardiff South and Penarth constituency election in 2019?

Labour held Cardiff South and Penarth constituency at the 12 December 2019 General Election. Labour won with a majority of 12,737 votes (25.2%). Turnout was 64.2%.

What does swing mean in UK elections?

Swing measures how much support has shifted between two parties compared to a previous election. The Butler swing formula — used in British election reporting since the 1950s — takes the average of the gain in the winner's vote share and the loss in the runner-up's. A 5% swing is considered large at ward level; anything above 10% is exceptional. The swing figure for Cardiff South and Penarth in 2019 is shown in the statistics above.