Collection National Survey for Wales: background information Details about how the survey is developed and carried out. First published: 4 February 2019 Last updated: 4 February 2019 Background Questionnaires 28 June 2021 Background Advance materials 15 May 2018 Background Technical information 30 March 2021 Background Development work 28 January 2020 Background Cognitive testing 17 December 2019 Background User feedback 17 July 2017 Background Datasets 1 July 2021 Background Related National Survey for Wales
