collection instrument on MH admissions at paediatric wards, 3) implement a prospective reporting system of MH crisis admissions from 15 paediatric wards in England and 4) carry out a qualitative study of the experiences of CYP admitted in MH crisis at 5 paediatric wards, as well as their families and staff members caring for them. Findings will be discussed with the stakeholder group so a final ToC can be developed with outputs agreed to achieve impact. Results Analysis of the national data and

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... screening of the data for the rapid literature review are in progress. Results will be available at the conference. Conclusions Primary outcomes of this study will be the characterisation of admissions for primary MH problems to acute children's wards, the co-creation of a data collection instrument, and the characterisation of the views/experiences of CYP, families and HCPs. Moreover, by producing a ToC approach, we expect to generate a system map to identify recommendations and transformation plans to share with policymakers, commissioners, service leads, and professionals. REFERENCES 1. Royal College of Paediatrics and Child Health. A snapshot of general paediatric services and workforce in the UK. Report, 2020. 2. Hudson LD, Chapman S, Street KN, et al. Increased admissions to paediatric wards with a primary mental health diagnosis: results of a survey of a network of eating disorder paediatricians in England. Arch Dis Child. 2021.