Ethics and research governance approvals for CRIS and associated (e.g., linked) data assume anonymity of the data analysed. As with any dataset, there is the potential within this database to compromise anonymity by generating unique variable combinations or rare categories. Please consider whether this issue may occur and detail any strategies that will be used to avoid compromising anonymity (for example suppression of small cell sizes). The CRIS Extraction Team are happy to provide advice on this, drawing on previous experience with other projects.