Al-Muhajiroun ( , '' The Emigrants '' ) is a militant Salafi jihadist network based in the United Kingdom . The founder of the group was Omar Bakri Muhammad , a Syrian who previously belonged to '' Hizb ut-Tahrir '' ; he was not permitted to re-enter Britain after 2005 . According to '' The London Times '' , the organisation has been linked to international terrorism , homophobia , and antisemitism . The group became notorious for its September 2002 conference , " The Magnificent 19 " , praising the September 11 , 2001 attacks . The network mutates periodically so as to evade the law ; it then operates under many different aliases . The group in its original incarnation operated openly in the United Kingdom from 14 January 1986 until the British Government announced an intention ban in August 2005 . Although the group preemtively " disbanded " itself in 2005 to avoid this , two aliases used by the group were proscribed by the British Home Secretary under the Terrorism Act 2006 ; '' Al Ghurabaa '' and '' The Saviour Sect '' . Further proscriptions followed with the Terrorism Act 2000 where '' Islam4UK '' was proscribed as an '' Al-Muhajiroun '' alias and '' Muslims Against Crusades '' followed in 2011 . More recent aliases have included '' Need4Khilafah '' and the '' Shariah Project '' , prescribed in 2014 , just before prominent members , including Anjem Choudary were sent to prison ( they have subsequently been released ) . The organisation and its activities have been condemned by larger British Muslim groups such as the Muslim Council of Britain and similar groups which represent the majority of Islam in the United Kingdom . In the United Kingdom , '' Al-Muhajiroun '' is the most notorious of the domestic Salafi-jihadist groups and its public spokesman Anjem Choudary has significant name recognition ; it is considered more radical than its initial parent organisation the '' Hizb ut-Tahrir '' , whose British-based branch does not advocate violence against the United Kingdom and thus has not been proscribed . Individual members of '' Al-Muhajiroun '' have been implicated in a number of terrorist attacks , including the murder of Lee Rigby ( Michael Adebolajo and Michael Adebowale ) and the 2017 London Bridge attack ( Khuram Butt ) . Some members , such as Zacarias Moussaoui , have been implicated in controversies surrounding '' Al-Qaeda '' . It has also operated a Lahore safe house for visiting radicals . Another member , Siddhartha Dhar , became an executioner for the Islamic State of Iraq and the Levant ( ISIL )
2017 London Bridge attack
2017 London Bridge attack
Al-Muhajiroun