The document summarizes statistics and issues related to health in UK prisons. It notes that the UK prison population has grown 30% in the last 10 years and is increasingly overcrowded. Many prisoners struggle with mental health issues, substance abuse problems, and learning disabilities/difficulties. These health issues are made worse by the prison environment and lack of adequate support. Upon release, former prisoners face high risks of reoffending, drug overdose, and other health problems without proper treatment and rehabilitation efforts.