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UK timeline, part 6 of 10

Police, courts and the British justice system

Wrongful convictions, Hillsborough, the Post Office Horizon scandal and other failures in British policing and courts.

WarningThis timeline is a starting catalogue. Unlike our fact-checked cases, each entry has not yet been checked against primary sources. Not every case involves dishonesty: many are honest changes as evidence improved.

The Birmingham Six 1975–1991

Wrongful conviction

Six men imprisoned for the Birmingham pub bombings had their convictions quashed.

The Guildford Four 1975–1989

Wrongful conviction

Convictions based on unreliable evidence and police misconduct were overturned.

The Maguire Seven 1976–1991

Wrongful conviction

Seven convictions connected to alleged explosives offences were quashed.

The Bridgewater Four 1979–1997

Wrongful conviction

Convictions in a notorious murder case collapsed after serious questions about the evidence.

The Cardiff Three 1990–1992

Wrongful conviction

Three men were cleared of Lynette White's murder after their convictions were found unsafe.

Stefan Kiszko 1976–1992

Wrongful conviction

A man imprisoned for murdering a child was exonerated after forensic evidence exposed the wrongful conviction.

Sally Clark 1999–2003

Wrongful conviction

A mother convicted of murdering her babies was cleared after serious problems with expert evidence.

Angela Cannings 2002–2003

Wrongful conviction

Her convictions for killing two babies were overturned after medical evidence was challenged.

Barry George 2001–2008

Wrongful conviction

His conviction for Jill Dando's murder was quashed, and he was acquitted at retrial.

Andrew Malkinson 2004–2023

Wrongful conviction

DNA evidence helped overturn a rape conviction after nearly two decades.

The Post Office Horizon scandal 1999–2024

Institutional failure

Sub-postmasters were blamed for accounting shortfalls despite flaws in the computer system.

Post Office Capture software 1990s–2025

Institutional failure

A later review identified a reasonable likelihood that an earlier accounting system had created apparent shortfalls.

Hillsborough 1989–2016

Cover-up

Police accounts blaming supporters were undermined by independent investigations and new inquests that found unlawful killing.

Orgreave policing 1984–2020s

Disputed official account

Serious allegations about police conduct and evidence during the miners' strike have remained contested; a criminal cover-up has not been established by an equivalent final inquiry finding.

The Stephen Lawrence murder investigation 1993–1999

Institutional failure

The Macpherson Inquiry exposed grave investigative failings and institutional racism.

The Daniel Morgan murder investigation 1987–2021

Institutional failure

An independent panel found institutional corruption connected to failures to investigate the killing properly.

The Met Police undercover relationships scandal 1968–2020s

Institutional failure

Covert officers entered intimate relationships with people they were monitoring, prompting investigations and legal redress.

The wrongful treatment of the Shrewsbury 24 1970s–2021

Wrongful conviction

Convictions arising from industrial-dispute picketing were quashed after evidence about unfairness emerged.

The David Oluwale case 1969–1970s

Institutional failure

The death of a homeless Nigerian man in Leeds exposed serious police abuse and resulted in convictions of police officers for assault.

The unlawful use of parts of stop-and-search powers 2010

Legal reversal

The European Court of Human Rights found the UK's broad, suspicionless terrorism stop-and-search regime lacked adequate safeguards.

The Horizon story is especially stark: hundreds of convictions were later quashed by legislation. The Criminal Cases Review Commission describes it as the most widespread miscarriage of justice it had encountered.

Last reviewed: 12 November 2026.