On the eastern boundary of Southall was the Hanwell Asylum, once the world's largest asylum for the mentally ill. It was considered in its day to be a progressive institution with a good success rate for treatment. As attitudes to and treatment for mental illness improved, the site was renamed St. Bernard's Hospital. In the late 1970s, the site was extensively redeveloped, with most of the area now taken up by the Ealing Hospital. St. Bernard's still operates a large facility on part of the site under the West London Mental Health (NHS) Trust.