What obligation does a data controller or processor have after appointing a data protection officer?

According to the UK GDPR, the controller and the processor must support the data protection officer in performing the tasks referred to in Article 39 by providing resources necessary to carry out those tasks and access to personal data and processing operations, and to maintain his or her expert knowledge1. The controller and the processor must also ensure that the data protection officer does not receive any instructions regarding the exercise of those tasks and that he or she reports directly to the highest management level of the controller or the processor1.