Boris Johnson could be set to mount a challenge to Theresa May’s reign as Prime Minister as he continues to criticise her Brexit plans.

The former Foreign Secretary has allegedly held secret talk with Donald Trump’s former strategist Steve Bannon in recent days, sparking speculation that he might be considering putting himself forward for the top job.

Mr Bannon and Mr Johnson would be familiar with each other from their respective time in government, with the American man working as a senior aide to President Trump in the White House.

It’s believed that the men met during Mr Bannon’s recent trip to London.

Speaking to the nature of their meeting, a source who spent time with Bannon during his trip told Buzzfeed, ‘I’m sure they weren’t discussing the cricket.’

The news comes as Mr Johnson launched another tirade at Ms May and her Brexit plans today, describing them as ‘unworkable’ and calling on fellow Tory MPs to ‘chuck Chequers’.

Johnson said her proposal for the UK’s exit from the European Union would leave the country in ‘vassalage, satrapy, colony status’ to the trading bloc.

Mr Bannon has travelled to Europe to reportedly set up an office in Brussels so he can begin to spread his brand of right-wing politics to a new continent.

He spoke very kindly about Mr Johnson in several interviews last week, publicly complimenting him for his views.