British Prime Minister David Cameron on Tuesday said there was only a "pretty slim" chance that he could bring forward to 2015 a referendum on the country's membership of the European Union which he wants to hold if he wins a national election in May, Reuters reported. Cameron has promised to renegotiate Britain's relationship with Europe on issues such as immigration and then hold a referendum by 2017, hoping to prevent a rise in Eurosceptic sentiment which has pushed some Conservative party voters towards the anti-EU UK Independence Party (UKIP).
