Once there were several claims of problems with the system any prosecutions must have been based on evidence of which witnesses CANNOT have given with absolute certainty which must give rise to suspicions of perjury by the management of the organisation and its witnesses. Officers of the company have to face the same ordeal of legal process as they subjected the innocent sub postmasters to for there to be any sense of justice.
It is becoming all to regular in the UK for companies to buy their way out of situations like this. Given that the courts were used as an instrument to try to cover up this issue The courts themselves should have those responsible from with Post Office management (and that includes those who were part of the issue but have now moved on) bought before them for due process. Clearly in certifying the evidence that was given in court they were playing fast and loose with facts and truth.
No prosecution = No Justice.