| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. R Thomas vs B Cafferty |
| ½-½ | 31 |
1967 |
BCF-ch | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 2. M Macdonald-Ross vs R Thomas |
| 1-0 | 59 |
1967 |
BCF-ch | D45 Queen's Gambit Declined Semi-Slav |
| 3. R Thomas vs A Ludgate |
| 0-1 | 40 |
1967 |
BCF-ch | C91 Ruy Lopez, Closed |
| 4. Wade vs R Thomas |
| ½-½ | 31 |
1967 |
BCF-ch | D30 Queen's Gambit Declined |
| 5. R Thomas vs F N Stephenson |
| ½-½ | 56 |
1967 |
BCF-ch | C75 Ruy Lopez, Modern Steinitz Defense |
| 6. T Thynne vs R Thomas |
| 0-1 | 44 |
1967 |
BCF-ch | A07 King's Indian Attack |
| 7. J L Seppings vs R Thomas |
| ½-½ | 29 |
1967 |
BCF-ch | A22 English |
| 8. R Thomas vs L P Burnett |
| 0-1 | 33 |
1967 |
BCF-ch | B32 Sicilian |
| 9. R Thomas vs D B Pritchard |
| ½-½ | 37 |
1967 |
BCF-ch | B08 Pirc, Classical |
| 10. P J Meade vs R Thomas |
| 1-0 | 32 |
1967 |
BCF-ch | B44 Sicilian |
| 11. Hawson JB vs R Thomas |
| 0-1 | 33 |
1967 |
BCF-ch | E43 Nimzo-Indian, Fischer Variation |
| 12. R Thomas vs R Waters |
 | 1-0 | 36 |
1968 |
England | C44 King's Pawn Game |
| 13. G Bonner vs R Thomas |
| 0-1 | 52 |
1968 |
BCF-ch | A34 English, Symmetrical |
| 14. R H Watson vs R Thomas |
| 1-0 | 41 |
1968 |
BCF-ch | C13 French |
| 15. R Thomas vs G Speed |
| 1-0 | 38 |
1968 |
BCF-ch | C91 Ruy Lopez, Closed |
| 16. R Thomas vs M Basman |
| 0-1 | 40 |
1968 |
BCF-ch | B02 Alekhine's Defense |
| 17. M Brigden vs R Thomas |
| 0-1 | 27 |
1968 |
BCF-ch | D74 Neo-Grunfeld, 6.cd Nxd5, 7.O-O |
| 18. L S Tate vs R Thomas |
| 1-0 | 30 |
1968 |
BCF-ch | C09 French, Tarrasch, Open Variation, Main line |
| 19. Golombek vs R Thomas |
| 0-1 | 42 |
1968 |
BCF-ch | E67 King's Indian, Fianchetto |
| 20. Aitken vs R Thomas |
| 1-0 | 49 |
1968 |
BCF-ch | C05 French, Tarrasch |
| 21. R Thomas vs P W Hempson |
| ½-½ | 18 |
1968 |
BCF-ch | D05 Queen's Pawn Game |
| 22. R Thomas vs F Parr |
| 1-0 | 49 |
1968 |
BCF-ch | B29 Sicilian, Nimzovich-Rubinstein |
| 23. R Thomas vs L P Burnett |
| ½-½ | 46 |
1968 |
BCF-ch | C74 Ruy Lopez, Modern Steinitz Defense |
| 24. R Thomas vs A H Perkins |
| 1-0 | 30 |
1969 |
BCF-ch Rhyl | B07 Pirc |
| 25. R Thomas vs R Bellin |
| 1-0 | 57 |
1969 |
BCF-ch Rhyl | A00 Uncommon Opening |