Nick Clegg has fuelled speculation that he is positioning for coalition with Labour next year by saying he believes Ed Miliband's party has "changed".
The Deputy Prime Minister also criticised the Tories for lurching to the right, accusing his current partners in government of becoming "much more ideological" since 2010.
The comments, in a BBC Radio 4 documentary, follow an apparent thaw in relations with shadow chancellor Ed Balls.
More top news
Gunmen have stormed a restaurant in Dhaka, Bangladesh, taking a number of hostages and opening fire at police. Here's what we know.
Wales came from behind to make history as a 3-1 win propelled them into the last four of a major football tournament for the first time.
Oliver Paps said: "I'm going to jump in the air - take a photo for me as a memory", before plunging 200ft to his death, witnesses said.