Abstract
This is the second of two papers reporting evidence from a programme of research that focused on how health visiting works, including service user and workforce perspectives. Evidence and professional expertise indicate that a set of essential features enable health visitors to achieve the desired impact of improving child public health. These include organising services in a way that enables positive parent/health visitor relationships, continuity and co-ordination and the flexibility to use professional knowledge and autonomy in practice. Where service specifications give careful attention to this evidence, it is more likely that health visitors will be able to deliver a successful child health programme for the early years.