| Europa League 1964/1965 - Appearances as Referee |  |
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| 22/09/1964 | Kilmarnock FC | - | Frankfurter SG Eintracht | 5:1 | - | - | - |
| 17/11/1964 | Dunfermline Athletic | - | VfB Stuttgart | 1:0 | - | - | - |
| Europa League 1964/1965 - Appearances as Referee | |
|
|
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| 22/09/1964 | Kilmarnock FC | - | Frankfurter SG Eintracht | 5:1 | - | - | - |
| 17/11/1964 | Dunfermline Athletic | - | VfB Stuttgart | 1:0 | - | - | - |
| Complete name: | John Adair Barker |
| Born: | 31/03/1919 |
| Place of birth: |
Northern Ireland |
| Residence: | Belfast |
| Nationality: |
Northern Ireland |