As I said, the performance review note that went in early July—there's no reason the Privy Council Office can't confirm the date it was sent, but my recollection is it would have been early July 2018—raised two issues with the Prime Minister. One was a recommendation of the performance rating for the 2017-18 year and some of the rationale for it. The bulk of the note was about the issue of when there should be a change of command. That's the note that went in early July. It didn't come back from the Prime Minister's Office until well into 2019.
On April 6th, 2021. See this statement in context.