Dame Cressida Dick “felt intimidated” into stepping down as Metropolitan Police commissioner after an ultimatum from Sadiq Khan, according to a review.
She quit in February when the mayor of London said he had lost confidence in her leadership.
Priti Patel asked the then chief inspector of constabulary Sir Tom Winsor to carry out a review into the handling of Dame Cressida’s exit.
Mr Khan said the review was “clearly biased” and “ignores the facts”.
Dame Cressida said the report had found Mr Khan “did not follow due process and at times his behaviour was oppressive, unreasonable, entirely unacceptable and unfair”.
Sir Tom’s paper also notes that the mayor’s actions were “not in accordance with the relevant legislation”.
The former commissioner previously said she had to resign after Mr Khan made it clear he had no confidence in her leadership.
It followed cases of sexism and misogyny among some Met officers.
Dame Cressida, the first woman to lead the UK’s biggest police force,…