Post Office Horizon Scandal: Hundreds of Innocent Sub-postmasters Wrongly Convicted
Over 900 sub-postmasters were wrongly prosecuted based on a faulty Fujitsu IT system, with many imprisoned, bankrupted, and some taking their own lives — the UK's worst miscarriage of justice.
Key Facts
Post Office Ltd / Fujitsu
£1+ Billion (compensation ongoing)
High Court, Court of Appeal, Public Inquiry
Ongoing
The Full Story
The Post Office Horizon scandal is widely described as the most widespread miscarriage of justice in British legal history. Between 1999 and 2015, the Post Office prosecuted over 900 sub-postmasters — the independent operators who run local post office branches — for theft, fraud, and false accounting, based on data from the Horizon IT system supplied by Fujitsu.
The Horizon system contained serious software bugs that created phantom shortfalls in branch accounts, making it appear that money was missing when it wasn't. Sub-postmasters were told the system was reliable and that they were the only ones experiencing problems. Many were pressured into pleading guilty, repaying shortfalls from their own savings, or accepting dismissal.
The consequences were devastating: - **Prison:** Dozens of sub-postmasters were imprisoned for crimes they didn't commit. - **Bankruptcy:** Many were forced to repay "shortfalls" of tens of thousands of pounds from personal funds, losing their businesses, homes, and savings. - **Families destroyed:** Marriages broke down, families were stigmatized in their communities, and relationships were irreparably damaged. - **Lives lost:** At least four sub-postmasters took their own lives. Others died before their names were cleared.
Throughout, the Post Office maintained that Horizon was reliable, even as internal documents later revealed that both the Post Office and Fujitsu knew of bugs in the system. The Post Office continued to prosecute despite mounting evidence that the system was flawed.
A group litigation brought by 555 claimants resulted in a landmark 2019 High Court judgment finding that Horizon contained bugs, errors, and defects. In 2024, following a massively popular ITV drama that brought the scandal to national attention, the UK government passed the Post Office (Horizon System) Offences Act 2024 to quash all convictions.
A public inquiry chaired by Sir Wyn Williams continues to investigate what happened and who was responsible.
Court Order / Regulatory Action
The High Court's 2019 judgment found Horizon was not reliable. The Court of Appeal quashed initial convictions in 2021. The Post Office (Horizon System) Offences Act 2024 quashed all Horizon-related convictions. A public inquiry is ongoing. The government has committed over £1 billion to compensation.
Outcome
900+ convictions quashed by legislation. £1+ billion compensation commitment. Public inquiry ongoing. Considered the UK's worst miscarriage of justice.
Impact on Consumers
The scandal exposed catastrophic failures in corporate governance, IT system oversight, and the justice system. It led to fundamental reforms in how the Post Office operates and renewed calls for corporate criminal liability.