February 2020 he announced a formal review would take place. There are also individuals looking at malicious prosecution either to take to CPS or a civil court.
If they'd suspected that a number of postmasters were committing fraud & brought in a new software system to prevent it & are now discovering instances of fraud even much more than they thought was occuring in the first place, confirmation bias would mean they thought the software worked & loads of postmasters were on the take.