Census area statistics (CAS) provide counts of people or households for geographical areas broken down by socio-demographic characteristics such as age, gender or employment. Digitised boundary datasets (DBDs) are a digitised representation of the underlying geography of the census.
Much of the material says it is Crown Copyright. It must be accessed via EDINA UKBORDERS - and stipulates that:
Access to digitised boundary datasets and look-up tables requires acceptance by registered users of additional special conditions. Principally these restrict use of the digitised boundary datasets and associated data to teaching and research.