"In order to argue for reform"?
Ah, that old line. Previously known as "renegotiation".
And when they say no? Well, we all know the answer to that one.
Ed Balls as Shadow Chancellor. Jon Cruddas heading the Policy Review. Three Eurosceptics out of three elected by Labour MPs to the National Executive Committee, one of whom has voted against every treaty since the first one. A third of the vote for an outspoken and dynastic advocate of withdrawal to chair the Parliamentary Labour Party.
And every single Labour MP in the division lobby for a real terms cut in the United Kingdom's financial contribution to the EU. Joined by fully one sixth of Conservatives, fewer than the number of Lib Dem MPs.