Frequently Asked Questions — Carshalton and Wallington Constituency

Who won the Carshalton and Wallington constituency election in 2019?

Conservative gained Carshalton and Wallington constituency at the 12 December 2019 General Election, taking the seat from Liberal Democrats. Conservative won with a majority of 629 votes (1.3%). Turnout was 67.3%.

What was the swing in Carshalton and Wallington at the 2019 election?

The swing in Carshalton and Wallington was 2.0% from LD to CON — a modest shift towards CON. Swing is calculated using the Butler two-party formula: the average of the change in winner's vote share and the fall in the runner-up's vote share compared to the previous election here.

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 Carshalton and Wallington in 2019 is shown in the statistics above.