Healthy London Partnership [1] has been established to improve health services and deliver changes to health in London. Its work is currently focused on 13 transformation programmes. Each programme aims to solve a different health and care challenge faced by the capital and all aspire to make prevention of ill-health and care more consistent across the city [2]. The transformation programme for children and young people, for example, aims to rebuild health care around London’s children and young people. It will focus on five key areas: developing population-based networks to promote health and co-ordinate care; reducing variation in quality of service; integrating care across health care services; commissioning pathways for complex childhood conditions and developing innovative access models of care [3].