His team of officials is:
AR1: Frank Connor
AR2: Douglas Ross
Fourth Official: Dougie Potter
AAR1: John Beaton
AAR2: Kevin Clancy
Refereeing
Collum to take charge of Barcelona v Olympiacos
16 Oct 17
William Collum will referee FC Barcelona v. Olympiacos on Wednesday in Match Day 3 in the UEFA Champions League.
![Image: Collum to take charge of Barcelona v Olympiacos [Migrated]](https://images.ctfassets.net/qu0slcxvbwp6/6cBdnFr55FjhulIAKK5fn2/3a4518f751bec56cc66fc746c16124a6/collum_640x360.jpg?fm=webp&fit=fill&f=face&w=640&h=360)
![Image: Abbie Hendry and Olivia Crawford on hand to inspire referees. [Migrated]](https://images.ctfassets.net/qu0slcxvbwp6/2AdfV9GeGB7dvnpxmQFOeQ/1a9670d840c61f9f8d6d3de22c22e398/21620573-1.jpg?fm=webp&fit=fill&f=face&w=3280&h=2192)
![Image: FIFA International List for 2026 Confirmed [Migrated]](https://images.ctfassets.net/qu0slcxvbwp6/7zAGruzI7lhLIGV8y4l3Zw/ce93db56e4980a318cab72b68046767b/21541576.jpg?fm=webp&fit=fill&f=face&w=4676&h=2954)
![Image: Nick Walsh promoted to UEFA Elite Referee Category [Migrated]](https://images.ctfassets.net/qu0slcxvbwp6/1Aua4TpMEqTupgttrIii97/0f9c1a5c75ba1c29ae6fe140872f0db3/21543997.jpg?fm=webp&fit=fill&f=face&w=4208&h=2800)