Mastering the Internet (MTI)[1][2] is a mass surveillance project led by the British communications intelligence agency Government Communications Headquarters (GCHQ) budgeted at over £1 billion. According to reports in The Register and The Sunday Times in early May 2009, contracts with a total value of £200m had already been awarded to suppliers.[3][4]
Responding to these reports, GCHQ issued a press release countering these claims of mass surveillance, stating that "GCHQ is not developing technology to enable the monitoring of all internet use and phone calls in Britain, or to target everyone in the UK."[5]
However, the 2013 mass surveillance disclosures revealed that GCHQ gathers "raw" information (without filtering out the communications of British citizens) from the web as part of its "Mastering the Internet" programme.[6]