The former British foreign minister David Miliband called at the weekend for voters to be given a second referendum on whether Britain should leave the European Union.
Writing in The Observer newspaper Mr Miliband, the foreign minister under a Labour government between 2007 and 2010, called Brexit an "unparalleled act of economic self-harm" and said there should be another public vote once the final terms of Britain's exit are known.
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Although no longer a serving British politician, Mr Miliband - the brother of former Labour leader Ed Miliband - is still seen as an influential centrist voice.
His criticism joins that of a growing number of pro-EU figures from across the political spectrum who say the prime minister Theresa May's Brexit strategy is economically damaging and that voters should be given a chance to halt the process.