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Article History

Received: 7 April 2017

Accepted: 10 September 2018

First Online: 1 October 2018

Authors’ information

: The information for the specific authors is listed as follows:CQ: PhD, Senior Research Fellow and qualitative methodologist in mental health and wellbeing of socially marginalised groupsRB: Professor in Primary Care Research, GP with Special Interest in Mental Health accreditationDS: PhD, Research Associate, Plymouth UniversityCS: PhD, Lecturer in Clinical Psychology, Plymouth University, and Lecturer in Clinical Research, Exeter UniversitySM: Professor, Director of University College London Centre for Behaviour ChangeAS: Research Assistant, Plymouth UniversityRT: Professor of Health Services Research, Exeter University. Academic lead for the Exeter Clinical Trials Support NetworkMM: Professor of Criminology, University of South WalesTH: Professor of Social Psychiatry, King’s College LondonJS: Professor of Forensic Psychiatry, Consultant Forensic Psychiatrist and academic lead for the Offender Health Research Network

: NHS ethical approval was obtained from Research Ethics Committee for Wales 10/MRE09/11 and MOJ and NOMS Research Quality Approval (RQA) approval 22/10. Written consent for participation was undertaken for all participants who were recruited to the study; these procedures formed part of the ethical approval process.

: Written consent for publication was undertaken for all participants who were recruited to the study; these procedures formed part of the ethical approval process.

: The authors declare that they have no competing interests.

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