| Champions League 2015/2016 - Appearances as Referee |  |
 |
 |
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| 16/09/2015 | KAA Gent | - | Olympique Lyon | 1:1 | 4 | - | 2 |
| 21/10/2015 | Galatasaray | - | SL Benfica | 2:1 | 8 | - | - |
| 25/11/2015 | Malmö FF | - | Paris Saint-Germain | 0:5 | 2 | - | - |
| Champions League 2015/2016 - Appearances as Referee | |
|
|
||||
| 16/09/2015 | KAA Gent | - | Olympique Lyon | 1:1 | 4 | - | 2 |
| 21/10/2015 | Galatasaray | - | SL Benfica | 2:1 | 8 | - | - |
| 25/11/2015 | Malmö FF | - | Paris Saint-Germain | 0:5 | 2 | - | - |
| 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 |