Duncan Smith: insists there must be no compromise on border controls

Senior Eurosceptics have fired a warning shot at Theresa May, threatening rebellion unless the prime minister delivers a “hard Brexit” that properly severs ties with the European Union.

About 25 MPs met for breakfast in the House of Commons on Wednesday to discuss how they will push for firm guarantees from May that she will surrender no control over immigration in discussions with Brussels.

They now plan to draw up a blueprint for Brexit and submit it to Downing Street.

Those familiar with the discussions say the MPs “do not trust” May to deliver on her pledge that “Brexit means Brexit”. They will insist:

• Total control of migration is a “red line” in the Brexit negotiations

• The 1972 European Communities Act, which took