The former foreign secretary’s team will reportedly launch his social media campaign for the top job that day before a number of Tories come out to back him. An insider told The Sun: “There are MPs supporting Boris who’ve been told to wait until Monday to go public. It could be an army.”
Another source added that Mr Johnson wanted to make a move before US president Donald Trump’s state visit grabs the spotlight next week.
They said: “Monday won’t be the official Boris launch but I think there’s a recognition that they now need to do something before Trump’s visit takes over – to get some momentum.”
The Tory leadership hopeful, who has vowed to take the UK out of the EU on October 31 with or without a deal if he is made prime minister, has already had a string of MPs endorse him.
Backers include prominent Brexiteer Jacob Rees-Mogg and former defence secretary Gavin Williamson.
And Mr Johnson is the bookmakers’ favourite of the 12 candidates battling for Theresa May’s job.
The former London mayor is 2/1 with Ladbrokes to be the next Tory leader.
Earlier this week, a poll by Conservative Home put Mr Johnson as the frontrunner for the leadership race.
Some 33 percent of voters backed Mr Johnson, with Dominic Raab in second place with 15 percent and Michael Gove on 12 percent.
The race for Number 10 is heating up, with Mark Harper becoming the 12th Tory to throw his hat into the race when he added his name to the list yesterday.
Theresa May announced plans to resign last week following a major backlash against her latest Brexit deal.
