Mentally ill criminals can also be treated within prisons.

In 1939 the East–Hubert Report recommended the creation of a special prison to provide psychological treatment designed to reduce the risk of reoffending. Special psychiatric wards were set up in prisons (Wormwood Scrubs 1946; Wakefield Prison 1947), and prison psychologists were introduced in 1950.

 In 1962 Grendon Prison opened for prisoners with mental disorders considered responsive to treatment; a significant proportion of its population is made up of prisoners with personality disorders

Mental Health

The maladaptive behaviour pattern now known as ‘personality disorder’ has a long history. Early nineteenth-century psychiatrists believed that mental illness resulted from a derangement of one of three essential faculties: reason (intellectual understanding), emotion (feeling or empathy), and will (the ability to control thoughts and feelings) (Colaizzi, 1989).

 Largely because of observed cases of violence, by the late 1820s there was a growing medical acceptance that a person might have normal intelligence but a warped personality which made it difficult or impossible to resist impulses.