The Met Police is to reduce the number of mental health calls officers attend in London as part of an initiative with the NHS.
The Right Care Right Person strategy aims to tackle the amount of time officers spend policing mental health.
Officers will not attend cases where help from a medical professional would be more appropriate, the Met said.
They will continue to attend callouts if a person is at risk of serious harm, NHS London added.
The model, initially rolled out by Humberside Police, had “proven hugely successful in reducing demand across all services, with the force seeing 7% of officer time freed up,” the Met said.
However, concerns have been raised from mental health professionals and the charity Mind.
From November, officers will no longer attend welfare checks for people who have missed an appointment or not taken medication.
They will also no longer look for people who have walked out of mental health facilities or hospitals unless there is a reason for police to be involved.
A new 24/7 helpline has been set up for officers to call before detaining someone under Section 136 of the Mental Health Act.
The Met said its officers spend an average of 14.2 hours in hospital with patients when they are sectioned.
In March 2023, the force spent 10,000 hours working on sectioning patients and in 2021-22 received more than 78,000 mental health-related calls, and some 204,000 concern-for-welfare calls.
Martin Machray, executive director of performance at NHS London, said: “While police will start attending fewer mental health callouts, they will still attend if a welfare check is needed or if an at-risk person has absconded from hospital.
“With the NHS in London seeing mental health referrals increase by two-fifths since before the pandemic, it is vital that this approach is rolled out gradually.”
Sarb Bajwa, chief executive of the British Psychological Society, welcomed the “phased approach” and said the partnership was “a positive step to ensuring people experiencing a mental health crisis access the support they need”.
Dr Sarah Hughes, chief executive of Mind, said the charity was “extremely concerned about the pace of these changes” and called for “guarantees about how it will be introduced safely”.
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