 Launched in 2007, Census.ac.uk provided a one-stop gateway to data and support services for users and researchers from higher education and further education in the UK to access census data from the 1971, 1981, 1991 and 2001 censuses.Census.ac.uk built on the work of the Census Registration Service (CRS) project (2001-2006), also based at the UK Data Archive, which provided a one-stop access and registration service for the same range of users and data.Census.ac.uk offered additional services, including centralized searching across all census resources, help and support for users, census guides, workshops and online training materials.