Omar Bakri Muhammad
Omar Bakri Muhammad (Arabic: عمر بكري محمد; born Omar Bakri Fostock; 1958) is a Syrian Islamist militant leader born in Aleppo. He was instrumental in developing Hizb ut-Tahrir in the United Kingdom before leaving the group and heading to another Islamist organisation, Al-Muhajiroun, until its disbandment in 2004.