Frequently Asked Questions — Brentford and Isleworth Constituency

Who won the Brentford and Isleworth constituency election in 2005?

Labour held Brentford and Isleworth constituency at the 5 May 2005 General Election. Labour won with a majority of 4,411 votes (9.6%). Turnout was 54.5%.

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 Brentford and Isleworth in 2005 is shown in the statistics above.