The Delivering Assisted Living Lifestyles at Scale (dallas) program was a large-scale, nationwide deployment of digital health and wellbeing products and services in the UK. Telehealth, telecare, mobile apps, personal health records, and assisted living technology were implemented by four large multi-stakeholder consortia and a multidimensional evaluation was carried out across the lifecycle from examining co-design and redesign of services through to rolling out services via statutory, private and consumer routes. A flexible toolkit of descriptive, process and