Co-production and adaptation of a prison-based problem-solving workbook to support the mental health of patients housed within a medium- and low-secure forensic service.

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

"The authors would like to express the sincere gratitude to all the individuals and organisations that have contributed to the publication of this research paper. They would like to thank Amanda Perry and Heather Baker who managed the project, devised the questionnaires, ran the workshops and collected and conducted the data analysis. They would also like to thank our colleague Anne Aboaja who was involved in the initiation and also supported the management of the project. They are also grateful to Nicola Dunn who helped arrange the patient workshops. Finally, Lindsey Wilson who collected data for feedback using the staff and patient survey, and all authors reviewed the draft of the manuscript. At last they would like to acknowledge the support of Ruby Bell and Rachel Weddle in the initiation of the project. This study eas supported by Research Capability Funds from Tees Esk and Wear Valleys NHS Foundation Trust in 2020/21 [Grant Number R22675]."