Whether the patient, if released/discharged, would be likely to act in a manner dangerous to himself or other persons.
Considered by:
In the first two cases, if the criterion is not met, the patient must be discharged.
In the third case the managers retain the discretion not to discharge in exceptional circumstances: see R (Huzzey) v Riverside MH Trust (1998) EWHC Admin 465 which was applied in R (SR) v Huntercombe Maidenhead Hospital (2005) EWHC 2361 (Admin).
See Nearest relative page for further details.