Post Office scandal: Sub-postmasters were used as 'guinea pigs'
IT expert Jason Coyne was instructed to examine the accounting system as part of a civil case in 2003, but after he flagged his concerns, the Post Office decided to settle the case out of court, and his report never came to light.
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Sub-postmasters and sub-postmistresses were essentially used as "guinea pigs" to grind out issues within the Horizon system, an expert has told Paste BN.