| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. G M Brace vs J Horner |
| 0-1 | 25 | 1967 | BCF-ch U18 | C30 King's Gambit Declined |
| 2. J Horner vs M J O'Hara |
| 1-0 | 27 | 1967 | BCF-ch U18 | A07 King's Indian Attack |
| 3. J Horner vs J E O'Dell |
| 0-1 | 33 | 1967 | BCF-ch U18 | A07 King's Indian Attack |
| 4. P Hoogendoorn vs J Horner |
| 1-0 | 33 | 1968 | Hastings II | C28 Vienna Game |
| 5. Keene vs J Horner |
 | 1-0 | 44 | 1970 | English Counties Final | A15 English |
| 6. A Phillips vs J Horner |
| 0-1 | 24 | 1973 | Hastings Challengers 1973/74 | C53 Giuoco Piano |
| 7. L De Veauce vs J Horner |
| 0-1 | 29 | 1973 | Staffordshire op | A10 English |
| 8. A H Williams vs J Horner |
| 1-0 | 32 | 1973 | Staffordshire op | C70 Ruy Lopez |
| 9. J Horner vs R Butters |
| 1-0 | 21 | 1973 | Staffordshire op | C00 French Defense |
| 10. J Horner vs J J Carleton |
| 1-0 | 30 | 1973 | Staffordshire op | C62 Ruy Lopez, Old Steinitz Defense |
| 11. J Quinn vs J Horner |
| 0-1 | 54 | 1973 | Staffordshire op | D07 Queen's Gambit Declined, Chigorin Defense |
| 12. J Horner vs G H Bennett |
| 1-0 | 28 | 1973 | British Championship | B40 Sicilian |
| 13. B Eley vs J Horner |
| ½-½ | 48 | 1973 | British Championship | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 14. J Horner vs Keene |
| ½-½ | 22 | 1973 | British Championship | C03 French, Tarrasch |
| 15. Miles vs J Horner |
| 1-0 | 53 | 1973 | British Championship | A04 Reti Opening |
| 16. J Horner vs N J Holloway |
| 1-0 | 17 | 1973 | British Championship | B22 Sicilian, Alapin |
| 17. R M McKay vs J Horner |
| ½-½ | 41 | 1973 | British Championship | D02 Queen's Pawn Game |
| 18. J Horner vs R G Wade |
| 1-0 | 54 | 1973 | British Championship | B01 Scandinavian |
| 19. J Horner vs C Pritchett |
| ½-½ | 41 | 1973 | British Championship | C78 Ruy Lopez |
| 20. W Hartston vs J Horner |
| 1-0 | 41 | 1973 | British Championship | C77 Ruy Lopez |
| 21. D Sully vs J Horner |
| 0-1 | 23 | 1973 | British Championship | A01 Nimzovich-Larsen Attack |
| 22. J Horner vs A Whiteley |
| 1-0 | 50 | 1973 | British Championship | B50 Sicilian |
| 23. N Povah vs J Horner |
| 0-1 | 36 | 1973 | London Invitation | C44 King's Pawn Game |
| 24. J Horner vs Nunn |
| 0-1 | 30 | 1973 | London Invitation | B06 Robatsch |
| 25. P H Clarke vs J Horner |
| 1-0 | 69 | 1973 | London Invitation | D02 Queen's Pawn Game |
Kibitzing
