Data are encrypted, then sent by secure transfer methods to the study team. The data sent and the database itself are stored on separate servers at the Medical Research Council Clinical Trials Unit at University College London (MRC CTU at UCL).
Data are processed and the study database can only be accessed by a few named individuals.
Datasets used for research analyses are anonymised.
By removing clinic identifiers and anonymising the dataset before it is used for analyses, researchers do not have information that could identify a patient.
There are data security and protection policies in place, and staff must undergo annual information governance training.