What Michael has said is of course correct, in England at least. However, there might be understandable confusion on behalf of a hospital if it is in Wales. The MHA Code of Practice for Wales says, at 16.46:
If, in exceptional circumstances, a police officer needs to take a person to an emergency department after detaining that person under section 136, for the emergency medical assessment or treatment of their physical health, this should not be treated as an admission to a place of safety. Detention under section 136 will begin when the person is taken to the appropriate place of safety for the assessment of their mental health.
I understand that this was Richard Jones’ view when the Code was published in 2016.
However, the 2017 ‘Guidance for the implementation of changes to police powers and places of safety’, issued following the amendments to the s.136 powers and applicable in both England and Wales, says the opposite at para 4.4:
If a person subject to section 135 or 136 is taken first to an Emergency Department of a hospital for treatment of an illness or injury (before being removed to another place of safety) the detention period begins at the point when the person arrived at the Emergency Department (because a hospital is a place of safety).
The introduction to the 2017 guidance says at para 1.5:
Both England and Wales have existing statutory Codes of Practice in relation to the 1983 Act. These statutory Codes of Practice remain in force and healthcare professionals must continue to have regard to the Codes in the exercise of their functions under the 1983 Act (although where there has been a subsequent change in the legislation, this may be a good reason to depart from what is set out in the Code).
So until the Code in Wales is amended, there are two forms of guidance in force, both expecting to be followed, but saying contradictory things. To complicate matters further, the Code is ‘statutory’ guidance (i.e. there is a high degree of expectation that it will be followed), but the 2017 guidance is not.
I think the Government would expect the 2017 guidance to take priority- note the encouragement to ‘depart from the Code’- but unless this message has been given clearly by Welsh Ministers to their hospitals, Health Boards etc , A & E staff and others can be forgiven for continuing to follow the advice they would have received when the MHA Code was revised in 2016.
Both Codes of Practice need revising and updating, but I imagine this won’t happen now until the current Mental Health Bill passes into law, so the ambiguity in Wales will continue for a while longer.