Mayday Hospital was originally the Croydon Union Infirmary, run by Croydon Board of Guardians. The first Infirmary was situated in the old Workhouse at Duppas Hill, where it remained after the Workhouse itself moved to new buildings in 1865. The new Infirmary was renamed Mayday Road Hospital in 1923, but soon afterwards became known as Mayday Hospital. After the dissolution of Croydon Board of Guardians in 1930, it was administered by Croydon Corporation (under the Local Government Act 1929). In 1948 it was taken over by the National Health Service. St Marys Maternity Hospital, in St James Road, originally opened in 1918. It became closely associated with Mayday Hospital. It closed in October 1985.