Unlikely, not in the near future at least.
Next government will be a coalition because no-one will vote LD, floaters may cross to Lab, and Con will not have enough left to get a majority.
Can't see UKIP doing as well as they did with the EU elections, but we shall see. It would have to be a UKIP/Con coalition to get an EU referendum, and I can't see that happening.
If we do, I'd be voting to stay in.