Boris Johnson is battling for survival as he braces for the impact of Sue Gray's long-awaited Partygate report.
The top civil servant is expected to highly critical of the culture in Downing Street in her report, which has been handed to No10 this morning.
Mr Johnson is expected to make a statement to MPs once the 37-page dossier is published, before making a grovelling appearance at the 1922 Committee of Tory backbenchers.