Andrea the CCRC would not have spent thousands or millions on this case if it was that simple.
There has always been doubt in this case and while evidence is still withheld it will continue and no doubt a fresh application is being prepared for the CCRC
As time goes on the subject of PII will be further scrutenised by the media and I believe evidence will not be hidden away so easily that might give definitive answers saving millions of pounds in applications to the CCRC
With respect, too, Jackie IMO the issue of PII may be a red herring and not some sort of Holy Grail in providing evidence of Jeremy Bamber's innocence . Essex Police, when they finally got their act together , interviewed and took statements from people who for example knew the family, knew Jeremy and Sheila specifically, more distant relatives etc . This material was not used in court, probably because it was peripheral to the main case. In addition they should have things like personal letters from Sheila to relatives which do not help Jeremy's cause because they present a different perspective on Sheila's state of mind in contrast to the picture of demonic psychotic illness favoured by those who argue that she was responsible for the shootings. I know that very sympathetic letters of condolence were sent to Jeremy after the murders offering help etc. These too seem to have disappeared and possibly are held by EP. Some gruesome crime scene photos such as off the twins head gunshot wounds may also have been kept out of the public domain. EP have a duty of care to protect
individuals and their families from the frankly brutal harassment of the media besides other private individuals with an interest in the case who are able to use the various web modes to broadcast their opinions without much fear of prosecution or civil action for defamation.
Even the children of family members who did provide evidence have been subject to quite intolerable pressures.
However, I do realise that PII witheld material does provide ammunition for conspiracy theorists. Maybe it would be better if the CCRC was more explicit about their awareness of PII documentation and its relevance to their deliberations and likewise could explain in more detail what is being witheld and why. At a personal level, I can tell you that my family's privacy could be at risk simply because a late relative
( not directly related to the Bambers ) made a statement as part of EP's wider investigation . I am pretty sure that I know the names of others in a similiar position.