I teach in the UK and wonder if someone can shed any light for me on the process for diagnosing ASD. I teach an adolescent female (on a daily basis for the past 2 years) who displays many characteristics for high functioning ASD (i.e. Aspergers or SCD). I am concerned that this has gone undiagnosed and feel that she would be better supported with the correct diagnosis. She was apparently assessed by a clinical psychologist a few years ago following a court order requesting an ASD diagnosis, but I have not seen the assessment report. She recently had a referral to CAMHS, who spoke to her about autism; she told them she was not autistic (she had researched it herself!) and they agreed (having seen her for an hour). They said her ASD-like behaviours are due to her experience of early childhood trauma/neglect, not ASD. Who normally can diagnose ASD? Is it possible for an incorrect diagnosis to be overturned by a subsequent assessment?... Thanks!