© 2018, Springer Science+Business Media, LLC, part of Springer Nature. The authors would like to note an omission of acknowledgements in this paper. Most importantly we would like to thank the young people, parents and clinicians who took the time to complete questionnaires and to speak to us about their experience, as well as Exeter CAMHS for their support of this work. Daniel Racey completed this work whilst supported by an NIHR Academic Clinical Fellowship, while Kelly Blockley and Vashti Berry are supported by the National Institute for Health Research (NIHR) Collaboration for Leadership in Applied Health Research and Care South West Peninsula. The views expressed are those of the authors and not necessarily those of the NHS, the NIHR or the Department of Health.