(27.11.2018) The chief of staff gave a 28-minute presentation to Labour MPs in Committee Room 12 of Parliament, alongside de facto deputy Prime Minister David Lidington and top Cabinet Office official Jonathan Black.

The trio then faced another half-hour of questions from their audience, during which they were told that Mrs May could lose the crunch vote on 11 December by 150 votes.

PoliticsHome has been passed a recording of the session, during which Mr Barwell said the deal was the „best available“ and insisted EU leaders will not change it if it is voted down.