The English have always been ambiguous towards "the continent". It is, as any self-respecting English person will tell you, full of foreigners. And England's Conservatives, particularly their more reactionary, chauvinistic rump, have always been anti-European Union.
So, as the EU contemplates moving towards greater integration, it was not entirely surprising UK Prime Minister David Cameron announced overnight he would hold a referendum on whether the UK would remain within the EU and, if so, on what terms. There was some ambiguity in Cameron’s speech, with some viewing it as a bet each way on the future of the UK’s relationship with Europe.
The Conservatives had already introduced a "referendum lock" on acceding further powers to the EU, which means further pro-EU changes have to go to a ballot. But Cameron is now looking to renegotiate the UK's relationship with the EU on those areas previously agreed to.