| Premiership 2021 Relegation - Appearances as Referee |  |
 |
 |
||||
| 10/04/2021 | Kilmarnock FC | - | Ross County FC | 2:2 | 6 | - | - |
| 12/05/2021 | Ross County FC | - | Hamilton Academical | 2:1 | 5 | - | - |
| Premiership 2021 Relegation - Appearances as Referee | |
|
|
||||
| 10/04/2021 | Kilmarnock FC | - | Ross County FC | 2:2 | 6 | - | - |
| 12/05/2021 | Ross County FC | - | Hamilton Academical | 2:1 | 5 | - | - |
| 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 |