Molehill Mountain Feasibility Study.

Up to half of autistic people experience anxiety symptoms, which can have a significant impact on everyday wellbeing. However, there are currently very few effective, evidence-based interventions to support autistic people in managing anxiety; and many autistic people face barriers in accessing inperson health and social care services. Therefore, developing new interventions (and/ or adapting existing ones) that improve anxiety, in a way that meets the needs of autistic people, represents the autism community's number one priority for research and clinical practice. Addressing this priority, the investigators will test the acceptability and feasibility of a new, app-based therapeutic approach for anxiety ('Molehill Mountain') that has been developed with, and adapted for, autistic people aged 12-years and over using adapted Cognitive Behavioural therapy principles. This means that information will be collected from autistic people accessing clinical services on whether they would choose to use the anxiety app, whether the app is simple to administer and use, how it is used, how it can be improved, and whether it is effective in reducing anxiety symptoms and/ or enhancing other outcomes, such as everyday wellbeing and functioning. The evidence from this project will inform the future optimisation and implementation of Molehill Mountain in a randomised-controlled trial, with the ultimate aim of transforming long-term healthcare delivery for autistic people.