Boris Johnson is forming a Brexit 'war Cabinet' to force through Britain's departure from the European Union in his first 100 days in office, the Telegraph can disclose.

The "crack team" - as one source described it - would comprise a tightly-knit unit of senior ministers and advisers charged with mapping out and tackling every possible obstacle on the way to Britain exiting on October 31.

It would then report back to the broader cabinet, which itself will be comprised entirely of ministers who signed up to Mr Johnson's deadline.

The plans are being developed by Sir Eddie Lister, who is heading up the transition team with Oliver Dowden, a Cabinet Office minister and Health secretary Matt Hancock.

One source said: "There will be a Brexit workstream and there are people signed up to it. It is expected to have senior figures and expertise from across the spectrum looking into it."