If you are working with another university or research institute for data analysis, it is important to understand who is the overall head of the research and where they reside (even if no data is ever held or accessed by anyone at that institution). Please contact us if you need help communicating the data application. See the offer of data products and services available through DARS. Specify the name and role of users in your organization to access the data. The Data Sharing Agreement or DSA is a contractual document between the data controller(s) and NHS Digital. The agreement is entered into when the data controller has demonstrated that he or she has met the strict data governance standards by completing the DARS application process. .