Question to the Department of Health and Social Care:

To ask the Secretary of State for Health and Social Care, how many patients are detained in assessment and treatment units in England.

Patients in assessment and treatment units in England are recorded in the Assuring Transformation data set, under the bed type Acute Mental Health Unit for Adults with a Learning Disability and/or Autism.

In December 2024, there were 160 inpatients detained in Acute Mental Health Units for Adults with a Learning Disability and/or Autism. This figure includes patients detained in assessment and treatment units, but may also include some patients who are held in other inpatient mental health settings. Patients held informally under the Mental Health Act, those that are not detained, have been excluded from the count.