Britain's Conservative Party leader David Cameron speaks during a press conference in central London, on November 4, 2009. British opposition leader David Cameron, tipped to be the country's next prime minister, outlined a new policy on Europe Wednesday after dropping a pledge to hold a referendum on the Lisbon Treaty. Cameron's Conservative Party U-turned on a 'cast-iron guarantee' to hold a national vote on the European Union's reform treaty after the Czech Republic gave it the green light Tuesday. It will now come into force on December 1. Getty Images logo Getty Images 27 months ago

Britain's Conservative Party leader David Cameron speaks during a press conference in central London, on November 4, 2009. British opposition leader David Cameron, tipped to be the country's next prime minister, outlined a new policy on Europe Wednesday after dropping a pledge to hold a referendum on the Lisbon Treaty. Cameron's Conservative Party U-turned on a 'cast-iron guarantee' to hold a national vote on the European Union's reform treaty after the Czech Republic gave it the green light Tuesday. It will now come into force on December 1.