A free vote can be held at any time.
If those fucktards vote to stay in they should know what to expect.
It doesn't matter how they vote. We will know how they have voted before we vote for them again at the next General Election. That is the point.
Getting MPs to have a free vote is really administratively very easy to do. The process is transparent and quick to arrange.
I am just brilliant, aren't I? I bet UKIP wish I was a member of their party.