participation in cpd activities has long been required for doctors working in the united kingdom a condition of employment in the nhs and later a condition of participation in the royal collages speciality schools for physicians in a system of fiveyearly revalidation was introduced for physicians and a system of revalidation is soon to be introduced for nurses it publishes performance reviews and inspection reports on a website to provide public assurance of the quality and safety of health services its role is to provide independent assurance of the quality and safety of health services