What way will the Liberal Democrats swing?

One unanswered question from the Lib Dem conference was, in the event of a hung parliament at the next election , would the Lib Dems side with Labour or the Tories?
If it is with the Tories, I think many people, especially in the North, would not vote Lib Dem, even if they might have done so previously.
I think the electorate deserves an answer to this question,to enable them to have an informed choice at the next election.