Joint Operations Cell is a unit of GCHQ, a British signals intelligence agency, and the National Crime Agency (NCA), a United Kingdom national law enforcement agency.[1][2][3][4] It opened in November 2015 with the intention of tackling a range of crime on the Dark Web, initially focusing on child sexual exploitation,[5][6] but also including international sex trafficking[4] and the sale of drugs and weapons on darknet markets.[6] Its intelligence methods include analysis of data gathered through mass surveillance.[3] Joint Operations Cell is a collaborative effort of GCHQ and NCA, co-located in Warrington.[3][7]