Frequently Asked Questions — Peterborough Constituency

Who won the Peterborough constituency election in 2017?

Labour gained Peterborough constituency at the 8 June 2017 General Election, taking the seat from Conservative. Labour won with a majority of 607 votes (1.3%). Turnout was 66.8%.

What was the swing in Peterborough at the 2017 election?

The swing in Peterborough was 3.3% from CON to LAB — a modest shift towards LAB. 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 Peterborough in 2017 is shown in the statistics above.