http://www.legislation.gov.uk/id/ukpga/Eliz2/7-8/72

http://www.legislation.gov.uk/ukpga/Eliz2/7-8/72/section/121/1991-02-01

Mental Health Act 1959

An Act to repeal the Lunacy and Mental Treatment Acts 1890 to 1930, and the Mental Deficiency Acts 1913 to 1938, and to make fresh provision with respect to the treatment and care of mentally disordered persons and with respect to their property and affairs; and for purposes connected with the matters aforesaid.