Counter-Terrorism Internet Referral Unit
The Counter-Terrorism Internet Referral Unit (CTIRU) was set up in 2010 by ACPO (and run by the Metropolitan Police) to remove unlawful terrorist material content from the Internet, with a specific focus on UK based material. CTIRU works with internet platforms to identify content which breaches their terms of service and requests that they remove the content on a voluntary basis.
Source: Wikipedia — Counter-Terrorism Internet Referral Unit (CC BY-SA 4.0)