For young people with autism spectrum disorder (ASD), the transition from childhood to adulthood especially for those with additional mental health problems can be challenging. Increasing numbers of young people attending child and adolescent mental health services (CAMHS) have a recognised diagnosis of ASD. What are the outcomes of these young people when they are discharged from CAMHS and how best can services support their needs? In this editorial we consider the emerging literature on transition for young people with long-term conditions and in particular those with ASD. Longer term studies suggest that the outcomes for individuals with ASD across the ability range is mostly poor and that healthcare transfer has generally not been managed well, with service users often reporting a lack of appropriate types of support. Encouragingly there is an increasing awareness of the need to support young people with long-term conditions as they negotiate the many developmental tasks of transition to adulthood. However, less is known about the experiences and aspirations of autistic individuals of all abilities as they transition to adulthood. This knowledge can inform a more nuanced approach to identifying developmentally appropriate outcomes. Recent studies with cognitively able young people with ASD, highlight some features in common with young people with long-term conditions but also the importance of identifying ways to foster underlying skills and the ability of young people with ASD to develop and maintain relationships. Child-focussed and adult-orientated healthcare services need to work directly with autistic individuals and their support networks to facilitate successful engagement with services and enable adults to manage their mental health needs. There is an urgent need to investigate the implementation and effectiveness of research and clinical guideline recommendations that aim to increase wellbeing, health self-efficacy and improve the mental health outcomes for autistic adults.

The growing interest in the use of cognitive behaviour therapy with children and young people has been encouraged by emerging evidence suggesting that CBT is effective with a wide range of child disorders. Typically, models and techniques developed for work with adults have been extended downwards and applied to children. This review questions the appropriateness of this approach and selectively identifies a number of key issues that need to be addressed. The absence of developmentally appropriate theoretical models to understand the onset and maintenance of maladaptive cognitive processes in children is highlighted. This lack of a coherent theoretical framework has led to a proliferation of diverse interventions falling under the general umbrella of cognitive behaviour therapy with the predominant emphasis being behavioural, rather than cognitive. Developmental factors, the nature, extent and type of cognitive processes in children and the important role of the parent in the onset and treatment of childhood problems have received comparatively little attention. There is a need to understand more about the cognitive processes of children and young people and to develop robust and testable developmentally appropriate theoretical models. In turn this will begin to address the question of which specific cognitive behaviour therapy programmes are effective for which childhood problems.