A police unit has been created to force the take-down of web pages which break the UK’s terrorism laws. The Government has set up a web page through which the public can tell the police about pages that they think are illegal.The Terrorism Act of 2006 gave police the power to demand that websites or material on websites be removed from the internet if they shared information that would be useful to terrorists or glorified acts of terrorism.
http://out-law.com/page-10720