| Europa League 1978/1979 - Appearances as Referee |  |
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| 13/09/1978 | CSKA Sofia | - | Valencia CF | 2:1 | - | - | - |
| 30/10/1978 | Bor. Mönchengladbach | - | SL Benfica | 2:0 aet | - | - | - |
| Europa League 1978/1979 - Appearances as Referee | |
|
|
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| 13/09/1978 | CSKA Sofia | - | Valencia CF | 2:1 | - | - | - |
| 30/10/1978 | Bor. Mönchengladbach | - | SL Benfica | 2:0 aet | - | - | - |
| Complete name: | John Clive Thomas |
| Born: | 22/06/1936 |
| Place of birth: |
Wales |
| Residence: | Treorchy |
| Nationality: |
Wales |