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Mark Reckless has helped secure a debate and vote on if there should be a referendum on Britain's membership of the European Union.
The Rochester and Strood MP made a proposal to the backbench business Committee on Tuesday.
Parliament will now consider whether or not a referendum should be held by May 2013 on the issue.
The outcome of the debate and vote, which will be held next Thursday, would not be binding on the government, but it would increase the pressure on Prime Minister David Cameron to hold a referendum.
Mr Reckless said: "We have been made too many promises about Europe for too long by too many parties and too many governments."