Data controller
The organisation that decides why and how your personal data is processed.
A data controller is the organisation that determines the purposes and the means of processing personal data — in plain terms, the why and the how. Under UK GDPR, the controller carries the main responsibility for handling data lawfully and for responding to your data-rights requests, such as access or erasure. This is general information, not legal advice. Identifying the controller matters because it names who must answer when you exercise a right that is yours to begin with.