FAQ U was presented, in the second week of its run, by the comedian who is part of what comedy duo?
FAQ U:  It was presented by Justin Lee Collins in its first week, David Mitchell in the second and Karen Taylor in the third. David Mitchell (comedian): David James Stuart Mitchell (born 14 July 1974) is a British comedian, actor and writer. David Mitchell (comedian):  He is half of the comedy duo Mitchell and Webb alongside Robert Webb.
Mitchell and Webb