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Corbyn has not only demanded that the new Tory prime minister must hold a second referendum on any deal or no-deal Brexit. He has also signed Labour up in advance to campaign for Remain. This new Labour betrayal of Brexit is even worse than that carried out by Theresa May. At least we always knew she was a Remainer at heart. But Corbyn, we were told, was a ‘man of principle’ who learnt his left-wing Euro-scepticism at the knee of his Labour hero, Tony Benn.

Now Corbyn has shamelessly abandoned his principles and given in to the political pygmies of Labour’s Remainer front bench. They have broken every promise that they made to millions of Labour voters – most notably, the 2017 Labour manifesto commitment to ‘respect the referendum result’. While they celebrate at their north London supper parties tonight, the party that claims to represent Leave-voting working-class areas like the North of England and South Wales will be met with more anger than they can possibly understand. Labour has effectively announced that it cares more about the opinion of the new metropolitan middle classes than about its traditional base of support.

Brexit news: Nigel Farage has lashed out at Jeremy Corbyn

Coming out as a party of a second referendum and Remain may slightly dent the rise of the Liberal Democrats, who have been making inroads among Remainers. But it will not be enough on its own to restore confidence in the Labour Party - or in Corbyn’s leadership. Even though they have now become a Remain party, still Corbyn tries to use ambiguous phrasing and mixed messages to keep a foot in both camps. The fact is, however, that he has lost Labour’s civil war over Brexit. He knows that if he were to continue to advocate respecting the referendum result and leaving the European Union, his leadership could be over. Like many a Labour leader before him, it seems Corbyn is willing to do anything to hold on to his position and the chance of power.

Brexit news: Nigel Farage said Jeremy Corbyn's Brexit policy was 'shameless'