The National Autism Plan for Children (NAS, 2003) encourages multi-disciplinary assessment and proposes that family contribution including the child’s developmental history and environment and observations from other settings are included. Multi-agency involvement in the assessment process is recommended by the Scottish Intercollegiate Guidelines Network, as it may ‘identify different aspects of ASD and aid accurate diagnosis.'(Assessment, diagnosis and clinical interventions for children and young people with autism spectrum disorders, SIGN 2007).Although diagnosis of an ASD is ultimately the responsibility of health professionals it is not made in isolation and information should be obtained from a wider multi-agency team including parents/carers, speech and language therapists, teachers and educational psychologists. The Psychological Service can contribute to the ‘Getting it Right for Every Child’ initiative, which focuses on the needs of the child and aims to streamline processes in order to deliver appropriate services thereby helping the child or young person fulfil their full potential. Other appropriate agencies e.g. health and social work services offer advice on and assist in particular and future interventions and strategies. (Educational Psychology Assessment in Scotland, 2005). Input from a Speech & Language therapist is usually necessary in order to support children and young people with difficulties in communication skills as well as issues involving eating and drinking. An occupational therapist can assist with co-ordination and movement difficulties and self-help skill such as washing, dressing and toileting.