Chain Reaction began as a pilot project in Newcastle to provide alternatives to traditional day opportunities for older adults aged 55 and over. It focuses on using existing community resources, developing new groups, and providing a personalized and member-led service to reduce social isolation. Key elements include one-on-one support, connecting members to activities in their community, and creating a network of natural support. The program has now expanded to work with additional organizations, roll out services across the city, and implement preventative support for more older adults.