http://www.legislation.gov.uk/id/uksi/2018/353

SCHEDULE 2Obligations in relation to authorisations granted or notices given under Part 3 of the Act and warrants issued under Chapter 2 of Part 6 of the Act

PART 1Relevant telecommunications operators

4.

To provide and maintain the capability to ensure the obtaining and disclosure, in their entirety, of all communications data to which an authorisation or warrant relates.