Panicked BBC staff put a black bucket and a box of tissues next to Tory veteran David Davis — who has spent the past year in exhaustive talks with the EU.

Insiders claimed he even had to be walked to his chair on the Andrew Marr Show after throwing up all morning.

As he was introduced by the presenter, the clearly unsteady Cabinet minister joked: “If the camera suddenly switches to you, you’ll know what’s happened.”

Aides today blamed a dodgy sandwich.