|Full name||William Collum|
18 January 1979|
|2000-||Scottish Football Association||Referee|
|2000-2008||Scottish Football League||Referee|
|2005-2013||Scottish Premier League||Referee|
|2013-||Scottish Professional Football League||Referee|
Collum officiated his first Scottish Football League match in November 2004, and his first SPL match in April 2006. He took charge of his first UEFA Champions League match in September 2010, overseeing FC Copenhagen's 2-0 win away at Panathinaikos, and has also officiated several high profile international matches and UEFA Europa League matches. On 11 June 2012 it was announced that Collum had been elevated to FIFA Elite Referee level joining Craig Thomson on the 24-strong list of the world's leading referees.
Collum was previously the principal teacher of the Religious Education department at Cardinal Newman High School, Bellshill, He then taught R.E. at St Aidan's High School in Wishaw, eventually returning to Cardinal Newman High School as an R.E. teacher in August 2012. He started his teaching career in 2000 at St Ambrose High School in Coatbridge working alongside notable teachers including John Cushley and Bob Winslow.