Almost seven in 10 Post Office sub-postmasters have experienced an "unexplained discrepancy" on the Horizon IT system since January 2020, a survey has revealed. It suggests faults remain in newer versions of the accountancy system still used by the Post Office,

Between 1999 and 2015, more than 900 sub-postmasters were wrongly prosecuted after faulty software called Horizon made it look like money was missing from Post Office branch accounts. Despite this, a version of the Horizon IT system is still in use in UK Post Offices.

Most subpostmasters say Horizon IT system still causing shortfalls - A survey of Post Office operators found that almost seven in 10 have had an ‘unexperienced discrepancy’ on the system since January 2020.