Heats (Declared Winners) Boys 12/13 Yrs 100m Breaststroke
| Place | Name | AaD | Club | Time | R.Time | | 50 |
| 1. | Matthew Johnson | 13 | Yorkshire | 1:08.67 | + 0.75 | | 32.57 |
| 2. | Alex Gregory | 13 | South Wales | 1:10.60 | + 0.69 | | 33.51 |
| 3. | Jamie Magee | 13 | N & Durham | 1:11.93 | + 0.85 | | 34.24 |
| 4. | James Robinson | 13 | Staffs | 1:12.26 | + 0.74 | | 34.36 |
| 5. | James Chater | 13 | Berks&SBucks | 1:12.45 | + 0.76 | | 33.85 |
| 6. | Nicholas Salerno | 13 | Sussex | 1:13.71 | + 0.73 | | 34.94 |
| 7. | Oliver Walker | 13 | Lancashire | 1:14.00 | + 0.81 | | 35.01 |
| 8. | Robert Bailey | 13 | Cheshire | 1:14.36 | + 0.90 | | 34.94 |
| 9. | Hiroki Harazawa | 13 | Surrey | 1:14.72 | + 0.65 | | 35.45 |
| 10. | Alex Peake | 13 | Middlesex | 1:15.36 | + 0.88 | | 35.29 |
| 11. | Harry Webster | 13 | Derbyshire | 1:15.77 | + 0.79 | | 35.59 |
| 12. | Louis Oliver | 13 | Warwicks | 1:16.05 | + 0.88 | | 35.27 |
| 13. | Rio Kurihara | 12 | Somerset | 1:16.77 | + 0.74 | | 36.40 |
| 14. | Matthew Brown | 13 | Kent | 1:16.92 | + 0.83 | | 36.67 |
| 15. | Kieran Watson | 13 | Scot East | 1:18.01 | + 0.88 | | 36.54 |
| 16. | James Clark | 13 | Wiltshire | 1:18.03 | + 0.89 | | 37.23 |
| 17. | Yaron Ash | 12 | Herts | 1:19.42 | + 0.83 | | 37.50 |
| 18. | Stoney Ho | 13 | Hampshire | 1:20.02 | + 0.79 | | 37.50 |
| 19. | Fletcher Priestley | 13 | Leics | 1:20.24 | -.-- | | 37.29 |
| 20. | Anton Auty | 13 | Suffolk | 1:23.27 | + 0.90 | | 38.71 |
