Labour for a Referendum, which has the support of 15 MPs, aims to force Miliband to commit to holding an in/out EU referendum after the next election.
As it was for the "Tartan Tories", the real test for UKIP is not whether it can take votes off the Conservatives but whether it can build a broader long-term coalition.
Were the EU referendum amendment passed, Cameron would either have to resign or abandon centuries of parliamentary convention.
Contrary to Nigel Lawson, the EU is not a monstrous bureaucracy, but the policy mix of austerity and reform is failing.
UKIP is the British version of a Europe-wide rejection of mainstream, established politics.
If, as Lawson predicts, Cameron's renegotiation strategy fails, the Tory party will suffer its worst split since the reform of the Corn Laws.
MPs just want Cameron to prove he means business (and that the Lib Dems don't).
A new survey shows that just one per cent of Romanians and four per cent of Bulgarians have begun to look for work in the UK and most will only migrate with a firm offer.
The government's posturing is about little more than saying enough to keep the eurosceptics quiet.
Just 7 per cent of foreign born nationals claim working age benefits, compared to 17 per cent of UK nationals.