On January 23, 2013, Prime Minister Cameron promised the people of the United Kingdom an in-out referendum on membership in the EU. He has been re-elected.
The leftist British newspaper the Independent might well have won its battle against Ukip but it has lost the war against the Tories: http://www.independent.co.uk/news/uk/politics/generalelection/live-general-election-2015-polls-latest-results-vote-10230994.html
See, also, this Wikipedia entry: http://en.wikipedia.org/wiki/Proposed_referendum_on_United_Kingdom_membership_of_the_European_Union
