The former Met police commissioner Dame Cressida Dick felt intimidated into resigning by the London mayor Sadiq Khan, according to a review.
The report by a former police watchdog was commissioned by the Home Secretary, after Dame Cressida stepped down.
Today she said it found Mr Khan had not followed due process, describing his behaviour as “oppressive, unreasonable, entirely unacceptable and unfair”.
Findings disputed by Mr Khan, who claimed the report was “clearly biased and ignores the facts”.