See Nick Wallis' coverage: * https://www.postofficetrial.com/2019/03/the-smoking-gun.html * https://www.postofficescandal.uk/post/ecce-chambers/
> [Anne] Chambers closed the ticket with a definitive: “No fault in product”.
> The cause of the defect was assigned to “User” – that is, the Subpostmaster.
> When Beer asked why, Chambers replied: “Because I was rather frustrated by not – by feeling that I couldn’t fully get to the bottom of it. But there was no evidence for it being a system error.”
...
> Chambers conceded: “something was obviously wrong, in that the branch obviously were getting these discrepancies that they weren’t expecting, but all I could see on my side was that they were apparently declaring these differing amounts, and I certainly didn’t know of any system errors that would cause that to happen, or that would take what they were declaring and not record it correctly…. so I felt, on balance, there was just no evidence of a system error.”
> No evidence. [Sir Wyn] Williams pointed out that it surely was unlikely to be a user error if both trainers and auditors had recorded the Subpostmaster as inputting information correctly. Chambers replied:
> “Well, yeah, I… yes, I don’t know why… I’m not happy with this one. But I still stand by there being no indication of a system error and the numbers that they were recording just didn’t make a lot of sense.”