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This is a plain English summary of an original research article. The views expressed are those of the author(s) and reviewer(s) at the time of publication.

Tighter working partnerships between health professionals and police services are likely to improve the care of people who come into contact with police during mental health crises.

People experiencing severe mental health episodes can present with extreme and unpredictable behaviour posing a danger to themselves and members of the public. Police are often the first to respond in these challenging situations.

New models are emerging of mental health staff working with police. This NIHR-funded review found limited UK-relevant evidence of mixed quality. Studies showed different models in use, from police and mental health staff responding to incidents together to health staff in police control rooms providing support and advice. There was little evidence on which approaches work best, but some research suggested a reduction in formal detentions although there were few outcome data reported.

Research shows potential for improving health outcomes for individuals in crisis by ensuring they are diverted to appropriate services, and in helping direct the appropriate use of police and NHS resources

Why was this study needed?

The growing volume of mental health-related emergency calls is an increasing challenge for police services. In London, in 2018 there were about 4,200 uses of ‘section 136’ that allow the police to take people with mental illness to a place of safety; for example, a hospital or emergency department. Lack of appropriate skills can result in inappropriate handling of such situations. Even when no crime has been committed, people experiencing a mental health crisis can often find themselves detained in police cells rather than being referred directly to relevant health care.

Police work in partnership with mental health professionals to manage these challenges using police-related mental health triage (PRMHT) known as street triage. This term describes a range of programmes and interventions including specialist police training and the use of on-call or on-site mental health professionals working with the police, although there are many variations in practice.

In the UK there is no universally accepted programme and little research data on the effects of this type of triage. This review assessed all the identified studies of triage interventions that have aimed to improve outcomes when police attend mental health-related incidents.

What did this study do?

The review looked at mixed study types, including 5 reviews and 16 primary studies, which were both quantitative and qualitative. These examined the effects, feasibility and implementation of PRMHT intervention models. The data synthesis focussed on a smaller number of these studies that were conducted only in England.

The studies were descriptive and mostly used data from police records and incident statistics alongside a small amount of qualitative evidence. Many did not include a comparison group, so were unable to conclude reliably how impactful police-related mental health triage interventions were.

This allowed for a qualitative assessment of what was provided but meant the review was unable to quantify the outcomes for police services, mental health services and the individual service users themselves. The study, however, provides a useful basis upon which further research can be planned.

What did it find?

  • Most police-related mental health triage schemes involved police officers working in partnership with mental health professionals but approaches varied from region to region.
  • Interventions included joint attendance at incidents by police and mental health professionals and the location of mental health professionals in police control rooms. They also included information-sharing agreements and 24/7 telephone advice led by mental health professionals.
  • Police officers appear to value PRMHT and when in receipt of relevant training were more likely to use health-based places of safety rather than police cells and to use the support of mental health professionals.
  • Schemes helped to reduce formal section 136-related police detentions, increase hospital admission rates to secure appropriate care and improve access to mental health services.
  • There is a lack of evidence around how PRMHT interventions directly benefit the service users, and stronger research is needed.

What does current guidance say on this issue?

Section 136 of the Mental Health Act authorises the transportation of a person who is in need of immediate care or control to a place of safety in order to assess their health needs. The Policing and Crime Act of 2017 mandates that where possible this should be to an appropriate health service rather than a police cell.

It is recognised within the Department of Health’s Mental health crisis care concordat that while dealing with mental health is a core police role this should not be done alone and should always involve the support of mental health professionals.

What are the implications?

Interventions fostering closer working partnerships between the police and mental health professionals can help the effective targeting of police and NHS resources, and improve patient outcomes. Well-developed lines of communication and information sharing are key in ensuring appropriate support and advice is available in the right place at the right time.

This study provides a useful and timely summary of intervention models that may help in achieving this. We do not have enough robust comparative information to know which approaches are most cost-effective. The findings help chart what is known and shape further research in this new field. This evidence is important for police and mental health services, and for ambulance staff who play a key role in transporting patients to relevant health care services.

Citation and Funding

Rodgers M, Thomas S, Dalton J, Harden M and Eastwood A. Police-related triage interventions for mental health-related incidents: a rapid evidence synthesis. Health Serv Deliv Res. 2019;7(20).

This research was funded by the NIHR Health Services and Delivery Research Programme (project number 13/182/14).



College of Policing. Memorandum of understanding: the police use of restraint in mental health and learning disability settings. Coventry: College of Policing. 2017.

HM Government. Policing and Crime Act 2017, part 4, chapter 4. London: The Stationery Office; 2017.

HM Government. Mental Health Act 1983, section 136. London: The Stationery Office; 1983.

Produced by the University of Southampton and Bazian on behalf of NIHR through the NIHR Dissemination Centre


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