Social isolation and loneliness are reported as having significant impacts on health, especially for older people. Policy concern has led to the creation of interventions to try and tackle these issues, including the funding of community-based support groups. The National Lottery Ageing Better Fund, 2015–2022 supported voluntary and community sector projects across England, to work with people aged 50 and over to reduce social isolatioand loneliness, through the delivery of area-based activities. One organisation, adopted and implemented a peer research model named Volunteer Listeners, designed and executed by older people as part of their approach to their local evaluation of National Lottery funded projects. This paper documents the peer research model used, its challenges, and its successes, to add to the evidence base about the reality of using participatory approaches, specifically with and for older people researching a health and social care related topic. There are very few published studies discussing how and why older people become involved in evaluation work as peer researchers. [ABSTRACT FROM AUTHOR]