Forensic psychiatrists often also do prison inreach work, in which they go into prisons and assess and treat people suspected of having mental disorders; much of the day-to-day work of these psychiatrists comprises care of very seriously mentally ill patients, especially those suffering from schizophrenia. Some units also treat people with severe personality disorder or learning disabilities. The areas of assessment for courts are also somewhat different in Britain, because of differing mental health law. Fitness to plead and mental state at the time of the offence are indeed issues given consideration, but the mental state at the time of trial is also a major issue, and this assessment most commonly leads to the use of mental health legislation to detain people in hospitals, as opposed to their getting a prison sentence.