| Champions League Qual. 2021/2022 - Appearances as Referee |  |
 |
 |
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| 18/08/2021 | BSC Young Boys | - | Ferencvárosi TC | 3:2 | 6 | - | 1 |
| Champions League Qual. 2021/2022 - Appearances as Referee | |
|
|
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| 18/08/2021 | BSC Young Boys | - | Ferencvárosi TC | 3:2 | 6 | - | 1 |
| Complete name: | William Collum |
| Born: | 18/01/1979 |
| Place of birth: |
Glasgow, 
Scotland |
| Residence: | Motherwell |
| Nationality: |
Scotland |
| Profession: | Lehrer |
| Height: | 174 cm |
| Weight: | 69 kg |