Information on the number of complaints made and upheld is given in the published annual reports of the Interception of Communications Commissioner and the Intelligence Services Commissioner. They are summarised as follows:
Applications received Investigations concluded 2 October to 31 December 2001 102 71 1 January to 31 December 2002 130 194 1 January to 31 December 2003 109 100 1 January to 31 December 2004 90 115 1 January to 31 December 2005 80 93 1 January to 31 December 2006 86 81 1 January to 31 December 2007 66 83 1 January to 31 December 2008 136 70
The reports show that since 2001 the Investigatory Powers Tribunal made determinations in favour of complainants in 2005 and 2008. The former related to two complainants who lodged a joint complaint; the latter related to two separate complainants. Copies of the Commissioners’ reports are in the House Library.