| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. V Knox vs J Horner |
| 0-1 | 38 | 1973 | London Invitation | C45 Scotch Game |
| 27. J Horner vs P J Waters |
| ½-½ | 40 | 1973 | London Invitation | C78 Ruy Lopez |
| 28. J Horner vs A H Perkins |
| 0-1 | 40 | 1974 | British Championship | C75 Ruy Lopez, Modern Steinitz Defense |
| 29. D M Wise vs J Horner |
| ½-½ | 20 | 1974 | British Championship | C77 Ruy Lopez |
| 30. J Horner vs M J Lightfoot |
| 1-0 | 58 | 1974 | British Championship | B31 Sicilian, Rossolimo Variation |
| 31. W Hartston vs J Horner |
| ½-½ | 44 | 1974 | British Championship | D07 Queen's Gambit Declined, Chigorin Defense |
| 32. J Horner vs A Ludgate |
| ½-½ | 63 | 1974 | British Championship | C84 Ruy Lopez, Closed |
| 33. D Mabbs vs J Horner |
| 0-1 | 29 | 1974 | British Championship | C51 Evans Gambit |
| 34. J Horner vs A P Law |
 | 0-1 | 30 | 1974 | British Championship | B50 Sicilian |
| 35. V Knox vs J Horner |
| 1-0 | 41 | 1974 | British Championship | C10 French |
| 36. J Horner vs P H Clarke |
| 1-0 | 23 | 1974 | British Championship | C15 French, Winawer |
| 37. J Penrose vs J Horner |
| 1-0 | 41 | 1974 | British Championship | C92 Ruy Lopez, Closed |
| 38. J Horner vs S Swanson |
| ½-½ | 34 | 1974 | British Championship | C74 Ruy Lopez, Modern Steinitz Defense |
| 39. J Horner vs R M McKay |
| ½-½ | 22 | 1975 | British Championship | B10 Caro-Kann |
| 40. J Penrose vs J Horner |
| ½-½ | 23 | 1975 | British Championship | C82 Ruy Lopez, Open |
| 41. J Horner vs N Povah |
| 0-1 | 41 | 1975 | British Championship | B31 Sicilian, Rossolimo Variation |
| 42. P J Lee vs J Horner |
| ½-½ | 40 | 1975 | British Championship | A10 English |
| 43. J Horner vs P H Clarke |
| 0-1 | 54 | 1975 | British Championship | C00 French Defense |
| 44. G Bonner vs J Horner |
| ½-½ | 58 | 1975 | British Championship | C29 Vienna Gambit |
| 45. D B Pritchard vs J Horner |
| 0-1 | 37 | 1975 | British Championship | C48 Four Knights |
| 46. J Horner vs A Ludgate |
| 0-1 | 64 | 1975 | British Championship | B06 Robatsch |
| 47. I Sinclair vs J Horner |
| 0-1 | 62 | 1975 | British Championship | A10 English |
| 48. J Horner vs K Neat |
| 0-1 | 40 | 1975 | British Championship | B43 Sicilian, Kan, 5.Nc3 |
| 49. M McCarthy vs J Horner |
| 0-1 | 41 | 1975 | British Championship | C98 Ruy Lopez, Closed, Chigorin |
| 50. J Horner vs M Basman |
| 1-0 | 32 | 1975 | London | B40 Sicilian |
Kibitzing
