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Nationality: Scottish

Date of Birth: 18 Jan 1979

Collum has refereed international matches, the 2008 Under-19 European Championship final and in the UEFA Cup. He is also a regular referee of Scottish Premier League matches. 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 Copenhagen's 2–0 win away at Panathinaikos, and has also officiated several high profile international matches and UEFA Europa League matches