Theresa May's Brexit plans will force Britain to "remain in captivity", Boris Johnson has warned as he says the Cabinet should stage a mutiny.

Writing in The Telegraph, the former foreign secretary says the Prime Minister is "on the verge of total surrender" to Brussels and says her plans are a "recipe for continued strife".

Urging people to "savour the full horror of this capitulation", he says Mrs May's plans for a customs union backstop are "shameful" and cannot be "conceivably" supported by any of her Cabinet.

It came as Eurosceptic Cabinet ministers warned Mrs May she will "feed the narrative of betrayal" and be defeated in Parliament if the UK is "trapped" in a customs union after Brexit.

Over the weekend the EU rejected the Prime Minister's plan for an "independent mechanism" that would enable Britain to break off temporary customs arrangements with Brussels after Brexit.