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Theresa May has insisted that she can still win concessions from Europe to help sell her Brexit deal to parliament, despite suffering a humiliating setback at an EU summit in Brussels.

European leaders reneged on an pledge to provide Mrs May with a commitment that the bloc was prepared to compromise on the Irish backstop.

Instead they deleted a clause in the summit’s conclusions that would see the bloc provide “a further assurance” that the arrangement would not “trap” Britain in a legally binding customs union indefinitely.

At a press conference this afternoon the prime minister attempted to put a brave face on the setback, insisting that EU leaders had today expressed willingness to look at agreeing such a document.

However video footage emerged of…