Are codesigned programmes more difficult to implement? A qualitative study of staff perceptions on the implementation of a new youth mental health programme.

"CONFLICT OF INTEREST STATEMENT The authors declare no conflicts of interest."

"The initiative described in this paper was funded by the Victoria Department of Health to address youth suicide. Funding for the evaluation of the initiative was provided by Suicide Prevention Australia without which this valuable study would not have been possible. The authors would like to thank and acknowledge all those who participated in the coproduction process and research component of this study, in particular the young people with a lived experience who gave up their valuable time and expertise. The authors acknowledge that this work was carried out on the lands of the people of the Kulin Nation and we pay our respects to their culture and their Elders past, present and emerging. Note on language: In this paper, the term ‘consumer’ and ‘young consumer’ is used to describe a person or young person with lived or living experience of mental health issues. The authors acknowledge that other terms are used such as a person with lived and living experience and service user in different countries and jurisdictions. Those who care for the young person are referred to as parents, families and carers, but we acknowledge that other terms may be used for unpaid carers throughout the world. Open access publishing facilitated by Monash University, as part of the Wiley ‐ Monash University agreement via the Council of Australian University Librarians."