Boys 12 Yrs/Under 50m Breaststroke - Heats (Declared Winners)
09 Yrs Age Group - Full Results
| Place | Name | AaD | Club | | Time | | | FINA Pt | |
| 1. | Bertie ROSE | 9 | Lincoln Vulc | | 53.79 | | | 99 | |
| 2. | Henry DOLAN | 9 | Grantham | | 54.81 | | | 94 | |
| 3. | George WOODHEAD | 9 | Retford | | 1:00.17 | | | 71 | |
| 4. | Barnaby DURANT | 9 | Grantham | | 1:00.32 | | | 70 | |
| 5. | Henry WILLERTON | 9 | Boston | | 1:00.44 | | | 70 | |
| 6. | Woody CLARK | 9 | Grantham | | 1:09.65 | | | 45 | |
| 7. | Jonathan ROOKE | 9 | Grantham | | 1:19.44 | | | 30 | |
| | Derrin BROCKLEBANK | 9 | Grantham | | DQ SL 1L | | | | |
10 Yrs Age Group - Full Results
| Place | Name | AaD | Club | | Time | | | FINA Pt | |
| 1. | Oliver CLARKE | 10 | Deepings | | 47.10 | | | 148 | |
| 2. | Oliver WILKINSON | 10 | Lincoln Vulc | | 48.34 | | | 137 | |
| 3. | Arlo HAMER | 10 | Co Lincoln P | | 51.94 | | | 110 | |
| 4. | Elliot GLEAVE | 10 | Grantham | | 53.21 | | | 103 | |
| 5. | Dan PALMER | 10 | Co Lincoln P | | 54.27 | | | 97 | |
| 6. | George LEONARD | 10 | Grantham | | 55.09 | | | 92 | |
| 7. | Oscar WOOD | 10 | Lincoln Vulc | | 55.25 | | | 92 | |
| 8. | Bobby WALLIS | 10 | Co Lincoln P | | 57.26 | | | 82 | |
| 9. | Joshua KIM | 10 | Grantham | | 57.67 | | | 80 | |
| 10. | Oscar CHEN-REES | 10 | Grantham | | 58.53 | | | 77 | |
| 11. | Stanley THURLOW | 10 | Lincoln Vulc | | 59.98 | | | 71 | |
| 12. | Benjamin GODDARD | 10 | Grantham | | 1:00.83 | | | 69 | |
| 13. | Alfie GROUNSELL | 10 | Retford | | 1:01.08 | | | 68 | |
| 14. | Alex NEVARD | 10 | Grantham | | 1:01.86 | | | 65 | |
| 15. | William CASH | 10 | Deepings | | 1:18.34 | | | 32 | |
| | Isacc BADGER-DONALDSON | 10 | Deepings | | DNC | | | | |
11 Yrs Age Group - Full Results
| Place | Name | AaD | Club | | Time | | | FINA Pt | |
| 1. | Samuel NICHOLS | 11 | Grantham | | 43.85 | | | 184 | |
| 2. | Robbie DUFF | 11 | Lincoln Vulc | | 45.16 | | | 168 | |
| 3. | Noah DEWSNAP | 11 | Retford | | 45.39 | | | 166 | |
| 4. | Cole COOPER | 11 | Co Lincoln P | | 45.56 | | | 164 | |
| 5. | James HUCKLE | 11 | Lincoln Vulc | | 46.99 | | | 149 | |
| 6. | Jonathan GBYLICZEK | 11 | Lincoln Vulc | | 48.93 | | | 132 | |
| 7. | Corey HESELTINE | 11 | Retford | | 49.59 | | | 127 | |
| 8. | Luca HALLAM | 11 | Grantham | | 51.13 | | | 116 | |
| 9. | Hugo WARD | 11 | Boston | | 51.52 | | | 113 | |
| 10. | Zachary WILSON | 11 | Lincoln Vulc | | 56.06 | | | 88 | |
| 11. | Yu Ching (Eugene) CHEU | 11 | Grantham | | 57.21 | | | 82 | |
| 12. | Leo BARNETT | 11 | Grantham | | 57.36 | | | 82 | |
| 13. | Charlie ANDERSON | 11 | Retford | | 1:00.24 | | | 71 | |
| 14. | Evan NIXON | 11 | Lincoln Vulc | | 1:01.77 | | | 65 | |
| | Daniel HUNT | 11 | Grantham | | DNC | | | | |
12 Yrs Age Group - Full Results
| Place | Name | AaD | Club | | Time | | | FINA Pt | |
| 1. | Samuel GREEN | 12 | Retford | | 37.50 | | | 294 | |
| 2. | Riley HAMER | 12 | Co Lincoln P | | 39.79 | | | 246 | |
| 3. | Thomas COLLINS | 12 | Retford | | 40.99 | | | 225 | |
| 4. | Reuben MEADOWS | 12 | Retford | | 41.55 | | | 216 | |
| 5. | James CASH | 12 | Deepings | | 44.15 | | | 180 | |
| 6. | Oscar DURANT | 12 | Grantham | | 46.63 | | | 153 | |
| 7. | Joel SADLER | 12 | Grantham | | 46.83 | | | 151 | |
| 8. | Noah SKINNER | 12 | Deepings | | 46.88 | | | 150 | |
| 9. | Kieran BLOOR | 12 | Co Lincoln P | | 47.57 | | | 144 | |
| 10. | Connor SMITH | 12 | Grantham | | 47.81 | | | 142 | |
| 11. | Matthew ROBERTS | 12 | Co Lincoln P | | 47.84 | | | 141 | |
| 12. | Zachary BARROWCLIFFE | 12 | Retford | | 51.19 | | | 115 | |
| 13. | Logan MEGGETT | 12 | Co Lincoln P | | 52.40 | | | 107 | |
| 14. | Thomas BURDOCK | 12 | Deepings | | 56.05 | | | 88 | |
| 15. | Thomas KINNEAR | 12 | Grantham | | 56.31 | | | 86 | |
| 16. | Ethan DERBY | 12 | Lincoln Vulc | | 56.39 | | | 86 | |
| 17. | Michael BUNN | 12 | Lincoln Vulc | | 56.67 | | | 85 | |
| 18. | Riley FOX | 12 | Lincoln Vulc | | 1:00.35 | | | 70 | |
| 19. | Henry COATEN | 12 | Grantham | | 1:13.54 | | | 39 | |
| | Owen THOMAS | 12 | Retford | | DNC | | | | |
| | Bobby THAIN | 12 | Skegness | | DNC | | | | |
| | Fabian KOLASA | 12 | Grantham | | DNC | | | | |
| | Tristan EKE | 12 | Co Lincoln P | | DQ SL 2L | | | | |
| | Finley ROWDING | 12 | Co Lincoln P | | DQ ST | | | | |