Regarding jury service, people with a mental illness are excluded under Schedule 1, Part D of the Juries Act 1974, which has not been repealed. (There are periodic calls for its appeal, however.) You can look at it here:
http://www.legislation.gov.uk/ukpga/1974/23/schedule/1
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Psychiatric Survivor
"And just when I've lost my way, and I've got too many choices . . . . I hear voices!"
http://www.youtube.com/watch?v=oLCfb54e_kM