As previously stated, GCHQ in the main merges bulk communications data with other
datasets containing communications data (for example, data20 obtained under an
interception warrant). GCHQ has a mechanism for reporting errors to the Commissioner,
but cannot easily differentiate the source from which the data is derived without
compounding any potential intrusion (for example, by re-running the erroneous query).
No errors have been reported to the Commissioner that relate specifically to data
obtained under a section 94 direction.
20 See section 20 of the Regulation of Investigatory Powers Act 2000 for definition of “related communications data”
http://www.legislation.gov.uk/ukpga/2000/23/section/20
www.iocco-uk.info
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