As a former member of the "Mull" team I think I can comment usefully that you need to get real and smell the coffee. My recollection and knowledge of the spreadsheet is that it simply records dates of communication from members of the public, MPs, Lords etc. It has no information in it other than the subject matter of the correspondence and where it is filed. It certainly does not contain the airworthiness audit trail because that was not the purpose for which the speadsheet was designed. It was purely to track correspondence nothing else.