Re: Sadly, in the UK, no one is held responsible for software errors
YET
Now the cat is out of the bag, there is a lot of information coming to light about who knew what and who ordered what. As I said, at the moment things seem to be working on dealing with the sub-postmasters who were wronged - but with all this evidence that's coming to light, my feeling is that things will change.
Perhaps TPTB might try and wriggle out of prosecutions, but I suspect there's a big enough group of wronged sub-postmasters, and people willing to take on the challenge, that private prosecutions could be in order.
But right now, it makes sense to sit back and let some of the detail emerge - and hence evidence of wrongdoing be shown - before starting that process off.
And when it does, I expect some people to be falling over themselves to testify - in order to save their own skins. A key things will be the techies involved who will certainly not want to be the scape goats for manglement - some have already testified that they told manglement about the problems and were forced to hush it up (as in, "speak up and never work in the industry again", sort of encouragement to keep quiet). Senior Fujitsu people will be keen to push as much blame as they can onto the Post Office, senior Post Office (of the day) people will be keen to push the blame onto Fujitsu - we've already seen Post Office people claim that they didn't know, while Fujitsu people have come up with evidence that they did. Similarly, senior people will be keen to say that juniors kept the facts from them, while those juniors have been happy to prove otherwise.
Given what's at stake, such proceedings can take a long time to grind their way through the system.