How do you add this information? 

With your permission, we send your unique ID (unique identifier) and some personal details such as your name, sex, address and date of birth, your NHS and National Insurance (NI) number – if available, to government departments and agencies. In other words, we use information which is unique to you so that your records can be identified by the government department or agency who hold records about you. We do not send your survey responses or other information about you.

Your administrative records are then identified and the information from these records is sent back to the CNC team along with your unique ID. Your personal details are not included in the file that is sent back to us. These are destroyed after your records have been identified. The CNC team then match your administrative records to your survey responses using your unique ID.