Theresa May will fly to Brussels on Saturday to seal her Brexit deal with EU leaders, but the real hard work will begin on her return, when she must win back dozens of her own MPs to get the agreement through parliament.

Eighty-five of the Conservative party’s 315 MPs have publicly rejected the controversial Brexit settlement, an analysis has shown. The prime minister would have to win over nearly an equivalent number of Labour rebels to get the final deal approved, a task considered sufficiently unlikely that May faced questions on Friday about whether she would resign if MPs voted against it.