Wasn't Lib Dem part of the Conservatives majority coalition (or whatever it is called) prior to the election? From what I was reading it sounded more like Lib Dem lost a lot of votes for not being Lib Dem's, then any sort of referendum against leftism.
But yeah, a lot of resignations last night, from what I recall the Lib Dem, Labour, and UKIP leaders all resigned following the results last night.
For interest/fun, the political compass chart for UK 2015 elections:
The Political Compass
Seems Tories are way too right, from what has been discussed in here. Haven't read on the methodology in a long time, so not sure how they are doing the charts now, but yeah.