Law enforcement / national security. E.g. https://www.gov.uk/government/publications/intelligence-services-retention-and-use-of-bulk-personal-datasets/intellig

Law enforcement / national security. E.g. https://www.gov.uk/government/publications/intelligence-services-retention-and-use-of-bulk-personal-datasets/intelligence-services-retention-and-use-of-bulk-personal-datasets-code-of-practice https://www.gov.uk/government/publications/intelligence-serv... Although I can anticipate what you'll say...