The aim of this Technical Report is to assist people in both referring to and using the data in the State of Ageing for their own purposes. Sometimes this may require referring back to the original data sources used in State of Ageing. All charts include a link in the footnote to the sources used, and there are further links in the text where needed. Not all the data used is publicly available as we have in some instances conducted our own analysis or commissioned analysis by age and other characteristics of data securely deposited with the UK Data Service.