Nick Clegg has wanted to avoid a referendum on the EU Treatystution by saying that it would be more useful to have a vote on whether Britain should stay members of the European Union at all. As Neil O'Brien explained earlier today - that really won't do.
Pro-referendum Labour MP Ian Davidson (pictured) is calling Mr Clegg's bluff. He's written a letter to the LibDem leader inviting him to back an amendment that would give the British people a vote on Lisbon and on our whole membership of the EU.
By agreeing to such a vote Mr Clegg will reaffirm the 'Democracy' half of his party's title. We need then the Tories to agree to the double vote and enough Labour rebels to honour their party's own pledge.
We're not holding our breath at ConservativeHome Towers but we're hoping...
5pm: The LibDems have walked out of the Commons after Mr Speaker blocked their in/out referendum amendment. Neither Ben Brogan nor Pete Hoskin are impressed...
Ben Brogan: "he Lib Dems staged a protest over the Speaker's refusal to choose their amendment on an in-out EU referendum. Ed Davey protested and was expelled for his pains. After much rhubarb in defiance of the Chair, Nick Clegg led his troops from the Chamber, to laughter and jeers. Dep Speaker Michael Lord handled the stunt with a light touch. I sympathise with the Speaker: is the Lib Dem leader's internal difficulties on his referendum commitment really a matter for the Commons?"
Peter Hoskin: "I've been praiseworthy of Nick Clegg in the past. But now he's shuttled from the sublime to the ridiculous at supersonic speed. The problem is: I don't know whether he'll be able to find his way back."