For reasons unknown,there still remains to be catalogues of errors due to lack of communication as well as conflicting information ( right hand never knowing what the left hand's doing ) Both are only as good as the ( correct ) information given to them.
Bottom line being good/honest police work,which in a lot of cases has been abysmal,not to mention insidious too,either through lack of training or deliberately to further their prospects !!
The CCRC were appointed as a supposed independent organisation in which to investigate MOJ's---------but unfortunately haven't lived up to their ability in doing so on a number of occasions. They are there,or should be,if a case has been refused by the court of appeal.