Theresa May was under fresh pressure last night as the DUP threatened to abandon her in a confidence vote if she failed to get her Brexit deal through parliament.

Party sources said that they were considering the move, which would leave the prime minister without a Commons majority, over fears that her plan would create a border between Northern Ireland and the rest of the UK.

The warning came as Labour said that it would table a no-confidence motion in the government if MPs voted down her Brexit deal next week.

Brexiteers and Remainers in the Conservative Party said yesterday that they could join forces to vote down the Brussels agreement. Mrs May will try to reassure MPs today by telling them that Britain would