The English Longitudinal Study of Ageing (ELSA)
\ði\ \ˈɪŋglɪʃ\ \ˌlɑnʤəˈtudənəl\ \ˈstʌdi\ \ʌv\ \ˈeɪˈʤiɪŋ\
A long-term data set on the dynamics of health, social, wellbeing and economic circumstances in the English population aged 50 and older.
The 2018 sample contained data from eight waves of data collection covering a period back to 2003.