MP Mr Collins is shown our dossier of online extremism which includes sickening images and clips

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The move to bring the world's most popular networking site to heel comes after we complied a dossier of depravity, revealing how its pages were being used to fuel violent extremism. Disturbing evidence suggests Facebook is now the go-to propaganda tool for jihadis who want to spread their warped message globally. A chilling video shows executioner Siddhartha Dhar declare triumphantly that Islamic State will one day invade the UK.

ISIS video that shows French teenager committing an execution on Facebook

The clip, which had been circulating for three years and been seen 1,600 times, ends with the execution of five accused spies. Our file of 33 gruesome films include sick recruitment drives by banned neo-Nazi group National Action, which celebrated the murder of Labour MP Jo Cox in 2016. We handed it to Damian Collins, chairman of the Commons Digital, Culture, Media and Sport Select Committee, who last night demanded a personal explanation from Facebook founder Mark Zuckerberg. Mr Collins said: "If you don't take down illegal content, radical content, when you are notified; if you don't take every reasonable step to find it for yourself, then we will take action against you as a company.

Conservative MP and DCMS chairman Damian Collins

This ISIS video has been on Facebook for over two years

"We are not going to ask you, we are going to require you." If passed, the law will mirror a move by Germany to stamp out a rise in far-Right hate speech. The Daily Express and the Counter Extremism Project (CEP) compiled a collection of violent and hate-fi lled material seen and shared on Facebook, which is meant to be used only by those aged 13 and over. The research found 26 terrorists behind global attacks - including London and Manchester - were at least partly radicalised on social media. Another 52 attempted to conduct or assist attacks and more were drawn into fighting overseas or spreading IS propaganda. Much of the horrific content is too graphic to reproduce here.

Conservative MP and DCMS chairman Damian Collins.

"This content radicalises people, gets them to join groups like IS and is killing people." Damian Collins, chairman of the Commons Digital, Culture, Media and Sport Select Committee

One clip sees an English-speaking IS fighter encouraging attacks in stadiums, on public transport and tourist attractions using trucks, knives, guns and poison. Three terrorists who attacked the West, Cherif Kouachi, Amedy Coulibaly, and Abdelhamid Abaaoud, are feted as heroes in the video, seen 47 times. Another IS film features three executions by children, one estimated to be just four.It had been on Facebook for five days and viewed 540 times. Mr Collins, who has a daughter of 11 and son, nine, said: "We have got to hear from Mark Zuckerberg why it is these discrepancies still occur. "This content radicalises people, gets them to join groups like IS and is killing people."

Facebook CEO Mark Zuckerberg