Post Office scandal: Witness had 'limited' Horizon knowledge

Fujitsu IT security analyst Andy Dunks gave witness statements in dozens of cases against Post Office sub-postmasters despite saying he had "limited" knowledge of how the Horizon system worked, an inquiry has heard. His statements helped to secure the convictions of some of the highest-profile sub-postmasters, including Seema Misra, Jo Hamilton and Lee Castleton.They were among 700 convicted by the Post Office…