The English Longitudinal Study of Ageing (ELSA) is a well-known, ongoing research study that explores the health, economic, and social dimensions of ageing in England. There are several synonyms that are used to describe this study, including the British Longitudinal Study of Ageing (BLSA), the English Longitudinal Aging Study (ELAS), and the Longitudinal Study of Ageing in England (LSAE). Despite the different names, these studies all refer to the same research project that has been providing valuable insights into the ageing process and how it affects the lives of older people. The ELSA is an important resource for researchers, policymakers, and anyone interested in enhancing the quality of life for seniors in England.