Objective We explored how services work together to support parents and children experiencing both parental intimate partner violence (IPV) and parental or child mental health problems by drawing on the perspectives of professionals working in primary care, children and young people's mental health services (CYPMHS), and domestic abuse services. Methods We conducted a qualitative study, interviewing 38 professionals in three geographically contrasting local authority areas in England. We carried out framework analysis using a systems approach and mapping techniques to understand the service interrelationships and boundary judgements of professionals. Results The relationships between domestic abuse services, CYPMHS, and primary care were complex, involving funders and commissioners, local authority strategic groups, and wider services such as schools and children's centres. Participants consistently identified a gap in the relationship between statutory CYPMHS and domestic abuse services. Other service gaps were for children living with ongoing or intermittent IPV and for children and parents with needs falling below or between service thresholds. There was a gap in support services for users of abusive behaviour to prevent future IPV. An overview of staff perspectives revealed differing views on treating the effects of trauma, and the co-ordination and sequencing of care. Conclusion Improving the response to children and adults experiencing mental health problems in the wake of IPV requires a systems perspective to understand the barriers to service co-ordination. Our findings indicate a particular need to address the gap between CYPMHS and domestic abuse services. Current ways of working with adults could be adapted for children, in addition to learning from examples of best practice in the study sites.

The authors have declared no competing interest.

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This study is funded by the National Institute for Health and Care Research (NIHR) Policy Research Programme (funder reference: PR-PRU-1217-21301; UCL award code: 177763). GF and OA's salaries were supported by the UK Prevention Research Partnership (Violence, Health and Society; MR-VO49879/1), an initiative funded by UK Research and Innovation Councils, the Department of Health and Social Care (England) and the UK devolved administrations, and leading health research charities. The views expressed in this article are those of the authors and not necessarily those of the UK Prevention Research Partnership or any other funder.

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