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.

Almost seven in ten sub-postmasters said they had experienced at least one 'unexplained discrepancy' in the accounting system since January 2020, years after faults in the software first came to light.

It suggests faults remain in newer versions of the accountancy system still used by the Post Office, which has been at the heart of one of the worst miscarriages of justice in British legal history. A poll of sub-postmasters by YouGov found that almost all of those who had difficulties with Horizon reported shortfalls in their accounts and most resolved them by using their branch's money.

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.