There, as the song says, may be trouble ahead.
http://uk.reuters.com/article/2014/05/3 … EQ20140531
UK's anti-EU voters to stick with UKIP party in national election - poll
In general, I tend to be a little careful about believing polls as they're so easily to corrupt but this rings true.
I suspect the Tories believe it as well and are more than aware, if they don't hit at Europe, they can forget government after the next election.
http://uk.reuters.com/article/2014/05/3 … QD20140531
Cameron says can't guarantee UK staying in EU if Juncker gets top job - magazine
Prediction.
The Tories will keep their promise of a referendum on European membership, doing a deal with UKIP that will involve no UKIP candidates in Tory probable win seats, and open support for the Tory party from UKIP members in these constituencies.
Labour is pushing a pro EU line and, if they continue, they have a much reduced chance of doing much in the next general election.