|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, however he stood down as principal in August 2011 to concentrate more on his refereeing. 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.
- Profile on the SFA website
- "Hibernian 0–1 Rangers". BBC Sport. 25 April 2010. Retrieved 25 April 2010.
- William Collum, WorldReferee
- W. Collum, Soccerway
- Scottish Cup final: Willie Collum to referee as holders Celtic face Hearts at Hampden, BBC Sport, 23 May 2019
- Pattullo, Alan (25 October 2010). "Man in the middle can't get away from fact that penalty call defined his game". The Scotsman. Scotland. Retrieved 29 October 2010.
- "Ref quits teaching post to be on pitch". The Sun. 17 August 2011. Retrieved 24 October 2011.
- O'Brien, Joe (1 July 2012). "Tommy Burns leads tributes to Celtic legend John Cushley". Daily Record. Retrieved 17 May 2017.
- "Former Childline Worker Denies Boys' Trip Incident" HighBeam Research. Retrieved 13 December 2016.
- "Teacher cleared of class trip sex abuse allegation". The Herald. 17 November 1999. Retrieved 17 May 2017.