| Champions League 2011/2012 - Appearances as Referee |  |
 |
 |
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| 14/09/2011 | FC Basel 1893 | - | Oţelul Galaţi | 2:1 | 4 | 1 | 1 |
| 06/12/2011 | FC Barcelona | - | BATE Borisov | 4:0 | 1 | - | - |
| Champions League 2011/2012 - Appearances as Referee | |
|
|
||||
| 14/09/2011 | FC Basel 1893 | - | Oţelul Galaţi | 2:1 | 4 | 1 | 1 |
| 06/12/2011 | FC Barcelona | - | BATE Borisov | 4:0 | 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 |