Abstract:Abstract: Personality disorders are common within specialist forensic mental health services and can complicate the treatment and care of people who may also have other co-morbid mental health problems; especially because they are based on unclear and unvalidated descriptions. The following article analyses the case of Laura who is a fictional character that represents the presentation of several women who have received care for personality disorder(s) and other mental health problems in a specialist forensic hospital. The assessment, formulation and care planning process conducted with Laura adhered to evidence based practice guidelines and led to reductions in aggressive behaviour and violent incidents. This case study shows how effective case formulation can be used to understand service users with complex problems including personality disorder(s) and enhance the safe and effective care provided. Overall this case highlights the necessity of consistent staff teams and clinical supervision when working with this client group. Key phrases1. This article will showcase the usefulness of case formulation when working with personality disorder 2. This case study will outline the care provided for women with severe personality disorders 3. This article will show how vital clinical supervision is for staff members working with personality disorders