What set JB with a further foot-hold on the case were notes that had inadvertently been sent to him when he was at Full Sutton and had made a request for documents. These " police notes " had been alongside those which he'd requested and which, besides others, were held under the PII instruction where, it had stated, were others. This, I believe was in 2017.
It's these " police notes " that held JB's interest as the information contained was what he'd wanted. This is with CCRC in the hope that an appeal will now follow, then exoneration of this dreadful crime.