Article 5 of that regulation, entitled ‘Principles relating to processing of personal data’, provides, in paragraph 1 thereof: ‘Personal data shall be: (a) processed lawfully, fairly and in a transparent manner in relation to the data subject (“lawfulness, fairness and transparency”); (b) collected for specified, explicit and legitimate purposes and not further processed in a manner that is incompatible with those purposes; further processing for archiving purposes in the public interest, scientific or historical research purposes or statistical purposes shall, in accordance with Article 89(1), not be considered to be incompatible with the initial purposes (“purpose limitation”); …’