Oh dear - it all sounds so damn confusing. I always preferred to stick to the soft left - no raging idealists. I thought the Lib Dems fitted that description, but from what I read, they are imploding. In any case, after the last election they made that dreadful deal with the devil. If I were in the UK I'd probably stick with Labour, and hope they had people-friendly policies and kept the books balanced.
I would never trust UKIP because they are a hard right party. They have successfully tuned into the Zeitgeist against too much immigration, and too much interference from Brussels, but that is just a couple of issues.
Meanwhile here in Australia the population is finding out the hard way that the conservative party, ie the Liberal National Party (LNP) has moved to the vicious right. In the May 13th budget, which may well fail to get through the Upper House, the burden has fallen on the very poorest and most vulnerable, while the rich lose hardly anything in comparison.
The Labour Party was on the nose, with the enthusiastic help of the Murdoch press, and people wished for change.
Well, they should have been careful what they wished for!!