EVENT 306 Boys 12 Yrs/Under 50m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 2 | 1 | Thomas KINNEAR | 10 | Grantham | |
| 3 | 2 | William CASH | 13 | Deepings | |
| 4 | 4 | Benjamin SHEARN | 14 | Grantham | 1:10.00 |
| 5 | 5 | Woody CLARK | 14 | Grantham | 1:06.47 |
| 6 | 7 | Henry DOLAN | 13 | Grantham | 59.67 |
| 7 | 8 | Derrin BROCKLEBANK | 14 | Grantham | 58.64 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 10 | Isacc BADGER-DONALDSON | 13 | Deepings | 56.59 |
| 2 | 11 | Henry COATEN | 11 | Grantham | 55.44 |
| 3 | 12 | Logan MEGGETT | 10 | Co Lincoln P | 54.22 |
| 4 | 17 | Bobby WALLIS | 12 | Co Lincoln P | 52.00 |
| 5 | 19 | Tristan EKE | 11 | Co Lincoln P | 50.90 |
| 6 | 20 | Joshua KIM | 12 | Grantham | 50.84 |
| 7 | 21 | Barnaby DURANT | 13 | Grantham | 50.39 |
| 8 | 23 | Yu Ching (Eugene) CHEU | 11 | Grantham | 50.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 25 | George LEONARD | 12 | Grantham | 49.55 |
| 2 | 26 | Oscar CHEN-REES | 12 | Grantham | 49.48 |
| 3 | 27 | Bertie ROSE | 13 | Lincoln Vulc | 49.10 |
| 4 | 28 | Thomas HILLSON | 13 | Grantham | 47.30 |
| 5 | 29 | Oscar WOOD | 13 | Lincoln Vulc | 45.94 |
| 6 | 30 | Leo BARNETT | 12 | Grantham | 45.72 |
| 7 | 31 | Noah SKINNER | 11 | Deepings | 45.60 |
| 8 | 32 | Owen THOMAS | 11 | Retford | 45.30 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 34 | Elliot GLEAVE | 13 | Grantham | 44.92 |
| 2 | 35 | Arlo HAMER | 12 | Co Lincoln P | 44.91 |
| 3 | 36 | Dan PALMER | 13 | Co Lincoln P | 44.87 |
| 4 | 37 | George WOODHEAD | 13 | Retford | 44.60 |
| 5 | 39 | Evan NIXON | 11 | Lincoln Vulc | 44.20 |
| 6 | 40 | Henry WILLERTON | 13 | Boston | 44.09 |
| 7 | 41 | Zachary BARROWCLIFFE | 11 | Retford | 43.86 |
| 8 | 44 | Samuel NICHOLS | 12 | Grantham | 42.29 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 46 | Michael BUNN | 11 | Lincoln Vulc | 42.10 |
| 2 | 47 | Corey HESELTINE | 12 | Retford | 42.00 |
| 3 | 48 | Oliver CLARKE | 12 | Deepings | 41.78 |
| 4 | 50 | Fabian KOLASA | 11 | Grantham | 41.24 |
| 5 | 53 | Kieran BLOOR | 11 | Co Lincoln P | 40.15 |
| 6 | 54 | Luca HALLAM | 12 | Grantham | 39.48 |
| 7 | 55 | Cole COOPER | 12 | Co Lincoln P | 38.80 |
| 8 | 56 | Connor SMITH | 10 | Grantham | 38.63 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 58 | Riley HAMER | 10 | Co Lincoln P | 38.17 |
| 2 | 60 | Thomas COLLINS | 10 | Retford | 37.51 |
| 3 | 63 | James HUCKLE | 11 | Lincoln Vulc | 37.00 |
| 4 | 65 | James CASH | 10 | Deepings | 35.50 |
| 5 | 64 | Reuben MEADOWS | 10 | Retford | 36.40 |
| 6 | 62 | Robbie DUFF | 11 | Lincoln Vulc | 37.08 |
| 7 | 59 | Oliver WILKINSON | 12 | Lincoln Vulc | 37.70 |
| 8 | 57 | Zachary WILSON | 12 | Lincoln Vulc | 38.54 |