 Taylor is historically notable as being the first Queen's Counsellor to hold the 'QC' position in both Scotland and England.William Taylor QC acted as Senior Counsel for Abdelbaset al-Megrahi during the Pan Am Flight 103 bombing trial from May 2000 to January 2001, and during the subsequent appeal in January to March 2002.Taylor was reappointed Commissioner at the Scottish Criminal Cases Review Commission by Royal Warrant from 1 January 2002 for a further fixed term of four years expiring on 31 December 2005.