# The Data Retention (EC Directive) Regulations 2009, Paragraph 5: Data necessary to trace and identify the source of a communication


(1) The calling telephone number.
(2) The name and address of the subscriber or registered user of any such telephone.

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Source: https://www.legislation.gov.uk/ukdsi/2009/9780111473894/schedule/paragraph/5 (the official version)
Page: https://openlegislation.uk/draft-data-retention-ec-directive-regulations-2009/schedule/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.