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 21 December 2018 Background Advance materials 15 May 2018 Background Technical information 26 February 2019 Background Development work 28 August 2018 Background Cognitive testing 13 December 2018 Background User feedback 17 July 2017 Background Datasets 3 January 2019 Background Related National Survey for Wales
