R (von Brandenburg) v East London and City MH NHS Trust [2003] UKHL 58

An ASW may not lawfully apply for the admission of a patient whose discharge has been ordered by the decision of a mental health review tribunal of which the ASW is aware unless the ASW has formed the reasonable and bona fide opinion that he has information not known to the tribunal which puts a significantly different complexion on the case as compared with that which was before the tribunal.