Guest slot: RodCrosby’s by-election trend analysis
History shows the challenge facing the Tories RodCrosby has done an analysis of by-elections swings, and the Swing-Back to governments’since the War. Using the Butler swing between Labour and Conservative, the Swing-Back is defined as the difference between the average swing to the Opposition in by-elections and the swing to the Opposition at the subsequent General Election. So, for example the average Butler swing from Labour to the Tories in by-elections 2001-2005 was 7.9%. The swing the Tories obtained in…