Dominic Cummings claims that the Prime minister uses Downing Street as a secret ‘escape’ to allow him to flee without civil servants being aware.
In an email newsletter service that he launched on Friday, the ex-aide stated this assertion to support his continued war of words against Tory senior figures including Boris Johnson.
Cummings was the trusted adviser to the Prime Minister until last November’s resignation. He said that his boss had installed an exit at No 10, so that he could ‘escape from his office without his outer office knowing.
“Now, he can leave his office, go into the Cabinet room and then walk into the Garden through the doors, leaving no trace,” he said.
Johnson also said that Johnson had’sabotage’ his plans to alter the physical layout in Downing Street’s office, claiming his plan did not include enough exits.

Boris Johnson is the Prime Minister. He uses Downing Street’s secret ‘escape” to get away from civil servants, claims Dominic Cummings.

Cummings served as the Prime Minister’s trust advisor up to his resignation last Nov.
On Friday, Mr Cummings published a newsletter detailing a dispute between Mr Johnson and himself over design details for No 10 Downing Street.
Cummings stated that he was “already clutching his head at dealing with the nonsense from Carrie’s wallpaper” – refering to the notorious ‘wallpapergate rebub of No 10 which is being dragged through Commons sleaze.
He stated that Johnson’s abandonment of his plans to redesign No 10 by January 2020 was “blackly ironic” given the fact that the coronavirus pandemic hit just eight weeks after Johnson had made the announcement.
Vote Leave architect revealed also that Johnson had moved his office to a “far grander” room, which was previously used by Cabinet Secretary last summer and has multiple escape routes.
Cummings, the prime minister’s top adviser, oversaw the renovation of the Cabinet Office (which is linked to Downing Street) into an open-plan area for policy-makers.
The room was equipped with Covid data, and policy advisors and experts were placed in groups according to their expertise.
In another fresh assault last night, Cummings said Mr Johnson wanted to spend his time writing a lucrative book while ‘pretending’ to be Prime Minister.
The former chief aide said Mr Johnson wanted to work on a book about Shakespeare to raise the large sums needed for his ‘very expensive’ divorce – and because he was ‘bored’ with being Prime Minister.
Writing on his blog, Mr Cummings said it was hypocritical for Mr Johnson to ‘have a go at MPs’ over the issue of second jobs ‘given all his own outside earnings’.
Last night, No 10 strongly denied the claims, insisting they were ‘not true’.
The news comes as the Standards Committee has been urged to investigate how the refurbishment of Boris Johnson’s flat was funded after it was revealed Tory donor Lord Brownlow paid an invoice to cover some of the costs.
As MPs look at how to tidy up Westminster after the Owen Paterson scandal, Boris Johnson will likely be called upon to answer questions about allegations of Tory sleaze.
Sir Keir Sternmer of Labour said that Prime Minister Tony Blair should apologize and clean out the ‘filthy Augean stable’ he had created.
In the aftermath of the Tory sleaze controversy, a shock poll gave Labour an advantage of six points.
This rapid turnaround increases pressure on Prime Minister David Cameron to do more and can cause panic among Tory MPs. One of the Tory MPs stated that he was close to submitting a letter of confidence in the Prime Minster.