A Tory peer has been forced out of her Foreign Office role after branding Boris Johnson a "liability" and urging him to step down.
Baroness Morrissey said the Prime Minister had shown no contrition after he survived a vote of no confidence on Monday, despite 148 Tory MPs voting for him leave No10.
Foreign Secretary Liz Truss was understood to have been outraged by the peer's comments and instructed the FCDO's top civil servant Sir Philip Barton to sack her.
Baroness Morrissey was lead non-executive director at the Foreign, Commonwealth and Development Office (FCDO), said Mr Johnson will be "damaging" to the party.
A source close to Ms Truss said: "She jumped moments before she would have been pushed."
Yesterday, Baroness Morrissey was asked during an appearance on LBC's Tonight With Andrew Marr if she wants Mr Johnson to carry on in No 10.
She said: "In all honesty I would rather he didn't. I don't see any contrition."
Asked about the impact of the Prime Minister clinging on to power, the Tory peer said: "I do think it will be damaging and I think we won't have seen the end of it."
Baroness Morrissey said she was not surprised that 41% of Conservative MPs voted against Mr Johnson in Monday's no confidence vote.
"When wavering MPs saw the booing of the Prime Minister outside St Paul's they could see he has become a liability rather than an asset," she said, referring to the public reaction to Mr Johnson during Platinum Jubilee celebrations.
She described the Prime Minister as a "very talented person" but added that "he's just in the wrong job".
A FCDO spokeswoman said: "Helena Morrissey has left her role as lead non-executive director at the FCDO."
The official declined to comment on suggestions Sir Philip, who Ms Truss has backed despite MPs demanding his resignation over the Afghanistan crisis, was told to sack the adviser.
Conservative former Cabinet minister Julian Smith tweeted that he was "v sorry" to hear Baroness Morrissey had left Government.
"Her drive, focus & commitment to diversity will be badly missed," he added.