Globally, more than 700,000 people die by suicide every year. Yet suicide is seen as a preventable phenomenon, and there are calls for prevention to be prioritised by mental health services. In the UK there is growing consensus in policies and guidelines towards carer involvement in a person’s mental healthcare, including their role in suicide prevention, and in the co-design and co-production of services. Notwithstanding, inadequate and inconsistent levels of collaborative working remain commonplace, with confidentiality and information-sharing protocols acting as a major barrier to involvement. There is also little recognition of the distress and difficulties carers may face in supporting those exhibiting suicidal behaviours, and what information, knowledge and support may be needed for them to safely hold high levels of risk.This project report provides a qualitative analysis of the literature exploring the needs and challenges of carers supporting suicidal adults, and how these can be addressed. It then critically reflects on the co-production of Stronger Together, a two-day quality improvement initiative being piloted in Devon to reduce suicide risk and improve patient safety through carer involvement. It also examines how this programme addresses (1) the needs and challenges of carers supporting those at high risk of suicide and serious harm, and (2) the barriers to carer collaboration within mental healthcare. A case study methodology employing autoethnographic and questionnaire methods is used for this purpose. Co-production was fundamental to shaping the content, structure and delivery of Stronger Together, to ensure its relevance and accessibility to carers. Learning from the development and implementation of this programme will be of value to mental health Trusts looking to find ways to embed a culture of carer collaboration to improve patient safety, reduce deaths by suicide and more effectively support patients’ family and friends.