[bots]

I'm not sure on the legalities, but without a formal arrangement of cooperation, I don't think it would be possible for Ed to form a government, if he had less seats than the tories, he simply would not be given the opportunity.

And Nicola herself happily stated in the Scottish leaders debate that she would vote against a labour queens speech if it supported austerity and/or trident. So, I don't think they will have anything close to an easy ride without a formal arrangement.