Young people with diabetes require specialised and personalised care as they make the transition from children's services to adult services. Getting the right care at this stage of their lives gives them the best chance of avoiding longer-term complications and remaining within the health service. Many policy documents and guidelines have been issued highlighting the importance of diabetes care during these years but little evidence exists as to what should constitute that care and how it should be provided. Few interventions have been evaluated and there are no national data comparing the effectiveness of transition services across the country. A national register of diabetes transition services and agreed measures of quality would enable paediatric and adult services to evaluate and improve the care they provide for this important group of young people. Copyright © 2014 John Wiley & Sons, Ltd.