sticky I don't know if you've seen this story
https://www.standard.co.uk/comment/cressida-dick-departure-sadiq-khan-priti-patel-met-police-b982876.html
Briefly, that's there's an even bigger scandal brewing, about police collusion in a murder years ago. There's been an inquiry: the suggestion is that Cressida's seen the report, though it hasn't been published yet, and knows there are “a dozen Daily Mail front page stories” in it that would have made her position totally untenable.
"It quotes a myriad of examples, from upwards of 50 police officers with criminal convictions allowed to join up in the last few years, to one police station safe with secret evidence that has the code to it scrawled above it on the wall. "