2011 Annual Report of the Interception of Communications Commissioner
long running investigations where communications data was pivotal in 2010, a reduction in the
number of major enquiries, and, budgetary restraints. It is noticeable that the number of requests
for ‘combinations’ of data falling under Sections 21(4)(a), (b) and (c) have increased (as described
in the next paragraph of this report) and this has also contributed to reducing the overall number
of requests.
Figure 4 – Number of Notices/Authorisations for Communications Data in the
Previous 4 Year Period
Number of Notices/Authorisations for Communications Data
560000
550000
540000
530000
520000
510000
500000
490000
480000
470000
460000
2008
2009
2010
2011
Figure 5 – Breakdown of Communications Data Authorisations/Notices by Type
Combination
17%
Service Use Data
6%
Subscriber Data
52%
Traffic Data
25%
29