Post Office scandal: Horizon system had 'fundamental problems' and postmasters 'were used as guinea pigs', says IT expert

More than 700 sub-postmasters and sub-postmistresses were prosecuted for accounting errors relying on data from the faulty Horizon software.

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Jason Coyne, an IT expert who was instructed to examine the Horizon system in 2003, has told Paste BN that the software had 'fundamental problems' and the levels of testing 'had not been conducted properly' ahead of the rollout.
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