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 London Prevention programme, for instance, aims to create a shift from disease management to health and wellbeing in communities, making it easier to make healthy choices and ensure the environments where Londoners spend their time encourage healthy behaviours. Working in partnership with Public Health England, local authorities and the Greater London Authority, five key areas will form the prevention programme: informing the transformation of health and care systems to embed health and wellbeing; improving workplace health, within and beyond the health care system; reducing smoking and obesity and promoting wellbeing; developing new and stronger partnerships to promote health and finally tackling city-level health challenges [3].