Frequently Asked Questions — South West Hertfordshire Constituency

Who won the South West Hertfordshire constituency election in 2017?

Conservative held South West Hertfordshire constituency at the 8 June 2017 General Election. Conservative won with a majority of 19,550 votes (32.2%). Turnout was 74.8%.

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 South West Hertfordshire in 2017 is shown in the statistics above.