It turns out Boris Johnson’s 4,000 word piece in the Telegraph on Friday on his post-Brexit “vision” is exactly what we thought it was: a threat cushioned by patriotic fluff. Which is a good way of describing the man himself, really.

Because the same paper has just published an exclusive story that the Foreign Secretary will resign from cabinet before the weekend if Theresa May doesn’t follow his desired plan for Brexit.

He wants to put pressure on May not to follow the “EEA minus” option, which would see the UK paying the EU permanently for access to the single market and other benefits. The Telegraph reports that he “could not live with” that arrangement and would quit.

Johnson is trying to distance himself from the story, which allies are calling “nonsense” and blaming on his enemies, suggesting they’re spreading it as revenge against his Telegraph essay.

This is the problem for Johnson. His intervention was co-ordinated with the same paper, which now has an exclusive on his resignation threat. Anyone watching his mischief-making over the weekend would assume it had come from him. Then again, his enemies would know that, too.

But the Prime Minister has a bigger problem. She is about to make a set-piece speech in Florence on Friday, outlining the government’s approach to Brexit. She was planning on showing a draft to cabinet on Thursday.

Up against a Tory party and cabinet divided over how hard or soft Brexit should be, it was always going to be a difficult task. With the threat of a high-profile cabinet resignation, it will be even harder. It shines the light on ideological divisions that she hoped to push out of the way of conference season. With Brexit addressed in the Florence speech, she could have used Tory party conference to focus on domestic policy (ie. looking like a Prime Minister in control for a bit). Now, it’ll be all about the party’s divides – and leadership challengers.