By Jack Maidment, Deputy Political Editor For Mailonline
Published: 09:46 BST, 1 July 2019 | Updated: 12:39 BST, 1 July 2019
Jeremy Corbyn supporters will flood Boris Johnson's London constituency just days before he is likely to win the race for Downing Street as part of a massive effort to make him the first sitting prime minister to lose their seat at a general election.
The Momentum campaign group is planning to bus in hundreds of Labour-backing activists to knock on doors across the Uxbridge and South Ruislip seat on Sunday July 21 with more events planned in the coming months.
Theresa May's successor is due to be appointed on July 24 and Mr Johnson remains the prohibitive favourite in the leadership race against Jeremy Hunt.
But Labour believes Mr Johnson is vulnerable to being ousted after his majority was cut in half at the 2017 general election from almost 11,000 votes to just over 5,000.
However, sources close to Mr Johnson said they believed the concentrated effort to get rid of him was because Labour is 'scared' of the former foreign secretary after he beat the party twice in London mayoral elections.
The next general election is not scheduled to take place until 2022 but the Brexit impasse means many in Westminster believe a snap poll in the not too distant future is almost inevitable.
Boris Johnson, pictured today on the campaign trail in Kent, saw his constituency majority cut in half at the 2017 general election and Momentum believes the former mayor of London in vulnerable
Mr Johnson, pictured today talking to people at the Sevenoaks garden centre in the south east of England, would be the first sitting PM to be ousted at a general election if Momentum's plan works
The Jeremy Corbyn-backing campaign group will bus in hundreds of activists to the Uxbridge and South Ruislip seat on July 21, just days before Boris Johnson could become PM
Jeremy Hunt today vowed to put Whitehall on a war footing for No Deal as he unveiled a £20billion plan to brace for hard Brexit.
The Foreign Secretary said he would immediately order the government to work on the assumption that there will not be an agreement - and threatened to cancel all holidays for senior civil servants.
He insisted 'turbocharging' preparations for No Deal would send a message the EU that the UK is 'willing and able' to walk away if negotiations fail.
In a series of sharp swipes at Boris Johnson, Mr Hunt warned 'belief' and 'rhetoric' was no substitute for meticulous planning - and said it was wrong to minimise concerns about the potential impact of leaving without a deal.
However, he faced an immediate rebuke from Chancellor Philip Hammond, who jibed that a PM who pushed through No Deal would not have any money to spend because of the 'hole' left in the public finances.
Momentum believe that