Personality disorder and police section 136 in Westminster: a retrospective analysis of 65 assessments over six months.

Section 136 of the 1983 Mental Health Act empowers the police to detain those suspected of being mentally ill in public places. The current study is a retrospective analysis of those occurring within Westminster, London, over a six-month period. A high rate of referral was found. In those individuals assessed, schizophrenia was the commonest diagnosis, but personality disorder provided the largest number of assessments. This was due to the propensity of the latter individuals to present on multiple occasions. Those with personality disorders were significantly less likely to be placed under further sections of the Mental Health Act, less likely to be admitted to hospital and more likely to re-present under a further section 136. The inability of the current system to address these individuals' needs is a cause for concern.