Dangerous and Severe Personality Disorder (DSPD) is a former categorization of personality disorder which manifests in a manner which poses a significant risk of serious crime and harm to others. It is not, and has never been, a clinical diagnosis; rather it was used in policy for categorizing dangerous individuals who should not be released, but were at the same time not treatable under the Mental Health Act 1983. DSPD was used in the United Kingdom, where the concept had been introduced in 1999 by the UK Home Office and Department of Health. The programme was launched in 2001, and it continued until 2013.