Labour leader Ed Miliband has said the the government's handling of the immigration system is "turning into a shambles", following reports that language certificates that offer smooth entry in the UK are being sold illegally for £500.
"We want tough controls, we want the right controls to be in place," he said. "I think we need urgent answers on what has been going on here."
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Ed Miliband faces a backlash over his party's use of quotes from some of Britain's biggest businesses to warn about the risks of an EU exit.