The Mental Health Act 1983 (Places of Safety) Regulations 2017

These Regulations specify the circumstances in which a police station can be used as a place of safety for an adult, for the purposes of powers in sections 135 and 136 of the Mental Health Act 1983 (that is, powers to remove or take an adult to, or to keep an adult at, a place of safety), as amended by the Policing and Crime Act 2017. Where a police station is used, the Regulations also describe the safeguards and steps to be taken to protect the person detained.

Link: The Mental Health Act 1983 (Places of Safety) Regulations 2017
Source: Legislation .gov.uk