The Death Olaseni “Seni” Lewis
Olaseni “Seni” Lewis was a 23-year-old IT graduate who died on 4 September 2010 after being restrained by Metropolitan Police officers at Bethlem Royal Hospital in South London. His death became one of the most significant cases involving the use of force in mental health settings and ultimately led to landmark legislation designed to improve patient safety and accountability.
On 31 August 2010, Seni voluntarily admitted himself to Bethlem Royal Hospital while experiencing a mental health crisis. Shortly after his arrival, hospital staff requested police assistance. Eleven Metropolitan Police officers attended and restrained Seni using prolonged face-down restraint for approximately 45 minutes. During the restraint he stopped breathing, suffering cerebral hypoxia – a severe lack of oxygen to the brain. He never regained consciousness and died four days later.
The initial investigation by the Independent Police Complaints Commission (IPCC) concluded that there was no evidence of criminal or disciplinary wrongdoing by the officers involved. Seni’s family challenged those findings through the courts, and in 2013 the High Court ruled that the investigation had been unlawful and fundamentally flawed. The judgment led to a fresh investigation and renewed scrutiny of the circumstances surrounding his death.
A 29-day inquest concluded in 2017 with a highly critical verdict. The jury found that the force used by police officers was unnecessary, unreasonable and disproportionate, and concluded that it had contributed to Seni’s death. The jury also identified serious failings by healthcare staff, including poor communication with police and inadequate monitoring of Seni’s condition throughout the incident.
Refusing to accept the original findings, Seni’s family campaigned tirelessly for justice with the support of organisations including INQUEST and the United Families & Friends Campaign (UFFC). Their determination helped transform public understanding of the dangers associated with prolonged restraint in mental health settings and highlighted the need for greater transparency and accountability.
Their campaign resulted in the Mental Health (Use of Force) Act 2018, widely known as Seni’s Law. The legislation introduced new requirements for mental health units in England, including mandatory recording and publication of restraint data, improved staff training, stronger oversight of the use of force, and greater involvement of families following serious incidents. The Act represents one of the most significant legislative changes to emerge from a death following state intervention.
Seni Lewis’s legacy continues to shape mental health care and policing across England. His family’s remarkable campaign has become a powerful example of how determination and perseverance can lead to meaningful reform, helping to protect vulnerable people and reduce the risk of future deaths during restraint.