Re: Did he do it or not?
"Whether or not the copper has broken the law by firstly, retaining the notes and subsequently disclosing them is another matter."
We've been told he was given access to the computer in order to investigate a complaint about leaking within westminster. He then took private copies of data from that computer which had nothing to do with what he was authorised to investigate. He then (albeit ten years later) shared information about that data with the press - again without any authorisation to do so.
This seems a pretty clear cut breach of the CMA to me.