Who would have won under a different voting system?

Does the electoral system really work in multi-party Britain?
These figures show how unrepresentative Parliament is when compared to the popular vote. Here’s just how different it would be:
– no, the Tory government would NOT have got a majority under proportional representation
– there would be 40 seats between Labour and the Tories, not 100
– Ukip would have 82 MPs not one
– the Greens would have 24 MPs, not one
More information: http://www.mirror.co.uk/news/ampp3d/general-election-result-who-would-5659167