The world’s longest continuously running birth cohort study, which follows thousands of participants born in the first week of March 1946 and is hosted by UCL, is celebrating its 80th birthday. The Medical Research Council (MRC) National Survey of Health and Development (NSHD), also known as the British 1946 birth cohort, has advanced understanding of what affects our health and wellbeing over a lifetime. Through questionnaires, clinic visits, and home visits, these study members have helped