Documentation of psychiatric institutions, primarily originating from the 19th and early 20th century county asylum system established under legislation such as the County Asylums Act 1808 and later expanded by the Lunacy Act 1845. These facilities were designed for long term care, typically as large, self contained sites with ward blocks, service buildings, and agricultural land. Decline began in the mid 20th century following policy changes favouring community based care, advances in psychiatric treatment, and the phased closure programme under initiatives such as Care in the Community. While many sites have been abandoned, demolished, or repurposed, a number remain in active use within the modern NHS estate, often redeveloped or integrated into general hospital campuses. Reports include site layout, ward configuration, construction details, and current structural condition, with reference to historical use, adaptation, and closure context.