West Park Asylum - Epsom - 2011
Managed to do one wing before being scuppered by security.
West Park was the last mental hospital to be developed on the Horton Estate, having been planned since 1906, prior to the opening of neighbouring Long Grove asylum. Initial development to have been completed for opening in 1916. From 1917 the main hospital was largely complete and utilised by Canadian Military, and subsequently handed back to London county council. The complete hospital was anticipated to hold approximately 2,000 patients of mixed class.
Taken From County Asylums -
http://www.countyasylums.com/mentalasylums/westpark01.htm