Votes versus seats in the 2015 general election

“Disproportionality is the degree of mismatch between parties’ shares of votes and their shares of seats, with measures of disproportionality usually calculated for national elections. This year’s general election was criticised by many as the least proportional ever. Chris Hanretty acknowledges that on some measures, this is a valid claim, but demonstrates that calculating a measure for local disproportionality gives a better sense of how the mismatch varied across England, Scotland and Wales. …

… constituencies in the South West also have high levels of local disproportionality – in part because of a large number of wasted votes for UKIP, but more because of the failure of the Liberal Democrats in what was previously a successful hunting ground.”

http://www.democraticaudit.com/?p=18360