Former PM Sir John Major lashed out at Tory ex-ministers for only ousting Boris Johnson when it was "self-damaging" to stay quiet.
The ex-Tory leader told a committee of MPs the blame for "lapses" in standards lay "principally but not only with the Prime Minister".
But he lashed out at Mr Johnson's former ministers and supporters, saying: "Many in the cabinet are culpable too and so are many outside the cabinet who cheered him on.