In short section 31 makes Personal Data exempt when used to discharge part of their regulatory functions, ie. policing.
We had argued that Police Scotland were using this as a blanket exemption to prevent any disclosure at all.
This was upheld and Police Scotland were instructed to disclose certain parts of the material that they hold.
Remember that this is a personal data request, Tom Taylor is requesting his own data only.
We understand that the case officer at the ICO in Wilmslow, Cheshire made the decision and then had the good sense to have his manager check and agree his decision, that Police Scotland are now apparently questioning.