Abstract. The Covid-19 pandemic has resulted in a greater than ever call for digital health and wellbeing solutions, especially those that might support potentially vulnerable members of our communities. In meeting this demand, there is an opportunity to apply learning from the real-world based work of living labs. This presentation will explore the methods used in a multi-stakeholder, cross-country collaborative living lab project, to design and test a digital innovation for use by older people, in the self-management of multimorbidity with the support of their care network.  Stakeholders involved in a forty-two month long project, across trial sites in two countries, included: older people with at least two chronic health conditions (heart failure, COPD, diabetes, heart disease); family caregivers; paid care support workers; and a wide range of hospital and community healthcare professionals. Collaboration with all stakeholders began in the project design and pre-requirements phase and was ongoing throughout the design, development, testing, implementation and evaluation phases.  Crucially, all engagement focussed on the older end-user of the digital solution, while also recognising the needs and requirements of the care eco-system around each user. Methods used included traditional focus groups and interviews but also cross-stakeholder user panels, design workshops, team sprints, friendly trial testing and both technical and wellbeing trial support. The wide breath of engagement methodologies applied resulted in considerable engagement throughout a lengthy 12-month trial, which is particularly notable given the age and health profile of the older participants. Secondly, multiple and cross-stakeholder approaches yielded an intervention that effectively tested transferability to other end-user cohorts as well as advancing pre-commercialisation readiness. Among the many findings from the project, some of the key lessons learned point to the value of sustained multi-stakeholder engagement through all stages of the innovation process, not just during the design and testing phases. The application of mixed methods facilitated tailoring of activities to the stakeholders, as well as the purpose and intended outcome of the activity. Furthermore, ongoing participation of researchers in parallel friendly trial activities ensured current familiarity with the technology used in the trial, especially where commercial grade devices are in use, and ensured researchers remained grounded in the real-world experience of participants. Ultimately, these methods, incorporated into a real-world contextual approach to digital innovation design and testing, form four cornerstones necessary for successful trial and implementation experiences for all stakeholders: competence, relevance, trust and ultimately engagement.