House of Commons Library

Electoral swing

Published Monday, December 3, 2012

Electoral swing is a way of comparing the performance of parties at elections. This note shows how to calculate swing using examples from the 2010 General Election and gives detail of general election swings since 1950 and record by-election swings.

Jump to full report >>

Electoral swing is a way of comparing the results of two elections in the same area. This note shows how to calculate swing using examples from the 2010 General Election and explains the limitations of swing as an analytical tool. It gives detail of general election swings since 1950 and the largest constituency swings at the 2010 election as well as record by-election swings since 1945.

Commons Briefing papers SN02608

Author: Rob Clements

Topics: Election results : UK, Elections

Share this page

Stay up to date

  • Subscribe to RSS feed Subscribe to Email alerts Commons Briefing papers

House of Commons Library

The House of Commons Library provides research, analysis and information services for MPs and their staff.