United Kingdom

Boris Johnson ‘believes he will return as Prime Minister next year’

However, senior Tories broke cover to urge members to press on. Sir Robert Buckland, the Welsh Secretary, said: “The Prime Minister has stepped down voluntarily. He plays no part in this leadership contest. He is not a candidate.

“The focus is now on uniting the party and winning the next election under a new leader.”

Former minister Steve Baker said it was time for Mr Johnson to step in before the government collapsed in what he described as a “Trump disaster”.

Mr Baker, who is backing Mrs Truss in the leadership race, said: “I would beg members supporting this campaign to think about what would happen if they won and Boris remained Prime Minister – the government would immediately collapse.

“Like it or not, Boris can form a government only because he is retiring. If members continue with this pro-Boris plan, they just get Rishi. Some individuals who don’t like both candidates can’t get us into a Trump disaster with a dysfunctional government.

“I hope that Boris will thank Lord Cruddas for his support but confirm that he must now step down. The UK’s political stability rests on it. I see no other alternative than Boris bursting this bubble before we have another political disaster.

Number 10 declined to comment on Mr Montgomery’s remarks or Lord Cruddas’ campaign.