Vote for policies
There's a very handy new website called "Vote for Policies" where you can check out which party's policies you support (by voting on the policies blind, without knowing which party they are from).
Its creators say "Vote for Policies is a campaign to make politics about policies, not personalities (or anything else for that matter).This website came from an idea to help us and our friends figure out who to vote for. Our aim is to help voters make a more informed decision about why we should vote for one party over another. Politics is for all of us, and we hope this site will make it easier for us all to engage with politics."
You can try it out here: http://voteforpolicies.org.uk/