Hizb ut-Tahrir Britain is the official name of the United Kingdom branch of Hizb ut-Tahrir, a transnational, pan-Islamist and fundamentalist group that seeks to re-establish "the Islamic Khilafah " as an Islamic "superstate" where Muslim-majority countries are unified and ruled under Islamic Shariah law, and which eventually expands globally to include non-Muslim states such as Britain. Wikipedia