On its inception, the London County Council assumed
responsibility for all three of Middlesex's existing asylums at
Hanwell (St.Bernard's), Colney Hatch (Friern) and Banstead, as well
as the planned Claybury asylum.
Surrey's recently constructed Cane Hill asylum was also
included. As patients within the catchment also became the
responsibility of the new council, the existing asylums were
already full to overcrowding - a situation briefly rectified with
the addition of Claybury and later Bexley asylums. At times of
severe shortage, the Metropolitan asylums board Imbecile asylums
took excess chronic patients as well as others boarded out to other
county asylums.
In an attempt to provide a permanent solution to future needs,
the large Horton Manor estate near Epsom was purchased and could
accommodate a number of separate institutions. Once purchased a
temporary asylum was immediately erected around the existing
mansion buildings, with three other asylums gradually developed on
park and estate farmland to keep accommodation in pace with the
expansion of London itself. A separate colony for male epileptics
was also built to the north.