From Hizb ut-Tahrir’s online English newspaper, The Khilafah:

Since then, fighting has continued between the current “transitional federal government” led by Sheikh Sharif Ahmed and “Al-Shabab” who are fighting to restore Islamic rule in Somalia. In response, to the continued pressure from the Muslims, the US has sent weapons to the weakening Sharif’s regime to thwart a takeover by those Muslims that seek to rule by what Allah سبحانه وتعالى has revealed.

So the version of Shariah that Hizb ut-Tahrir wants to establish is the same one that Al-Shabab is applying in Somalia, where this happened, along with assorted other deviancies. No thanks…