I have now updated the swingometers on the site with 2010 election data.
Dull old text version here – http://ukpollingreport.co.uk/blog/swing-calculator
Lovely graphical version (but needs a plug-in for Internet Explorer) – http://ukpollingreport.co.uk/blog/swingometer-map
Enhanced graphical version with seperate swings for Scotland and Wales – http://ukpollingreport.co.uk/blog/advanced-swingometer-map
Of course, these may turn out to be of purely academic interest, since the government still seem to be intending to reduce the number of seats by 10% in time for the next election, and that’s leaving aside the possiblity that the voting system itself is changed. We shall cross those bridges when we reach them though!