EVENT 206 Open/Male 12 /Under 50m Breaststrok - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | George SPENCER | 9 | Grantham | |
| 4 | 2 | Finlay MATHESON | 9 | Co Lincoln P | 1:20.00 |
| 5 | 3 | Finlay HODSON | 9 | Deepings | 1:20.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 4 | Yousef HAFEZ | 9 | Co Lincoln P | 1:20.00 |
| 3 | 5 | Henry MOSS | 12 | Deepings | 1:20.00 |
| 4 | 6 | Jack PAIGE | 11 | Deepings | 1:20.00 |
| 5 | 7 | George PAYNE | 10 | Deepings | 1:20.00 |
| 6 | 8 | Laurence DE ROSE | 9 | Deepings | 1:20.00 |
| 7 | 9 | Albie WILSON | 9 | Deepings | 1:20.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Ethan BAILEY | 10 | Deepings | 1:20.00 |
| 2 | 11 | Jack DAWSON | 9 | Deepings | 1:20.00 |
| 3 | 12 | Hector BARR | 10 | Deepings | 1:20.00 |
| 4 | 13 | Jack CHAMBERS | 9 | Grantham | 1:20.00 |
| 5 | 14 | Gilbert NICHOLLS | 9 | Grantham | 1:20.00 |
| 6 | 15 | Oliver FAWCETT | 9 | Grantham | 1:20.00 |
| 7 | 16 | Oscar BEMBRIDGE | 9 | Grantham | 1:20.00 |
| 8 | 17 | Ethan DANIELS | 11 | Lincoln Vulc | 1:13.18 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Ethan COOK | 10 | Co Lincoln P | 1:13.09 |
| 2 | 19 | W POWELL-VREESWIJK | 10 | Grantham | 1:10.70 |
| 3 | 20 | Theo MIDDLETON | 11 | Deepings | 1:09.80 |
| 4 | 21 | Ewan BELL | 10 | Lincoln Vulc | 1:08.43 |
| 5 | 22 | Tom GRIFFIN | 11 | Deepings | 1:05.65 |
| 6 | 23 | Leo GOODWIN | 12 | Lincoln Vulc | 1:05.00 |
| 7 | 24 | Jenson FRANCIS-SWABY | 10 | Co Lincoln P | 1:04.63 |
| 8 | 25 | Henry BOWERS | 10 | Grantham | 1:04.61 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Edward BIRINY | 11 | Lincoln Vulc | 1:04.55 |
| 2 | 27 | Zachary SMITH GOMEZ | 10 | Lincoln Vulc | 1:03.34 |
| 3 | 28 | James BAILEY | 12 | Deepings | 1:03.23 |
| 4 | 29 | Jack ROWSELL | 11 | Co Lincoln P | 1:02.79 |
| 5 | 30 | Ali HAFEZ | 10 | Co Lincoln P | 1:00.00 |
| 6 | 31 | Leo FRANCZAK | 10 | Co Lincoln P | 59.63 |
| 7 | 32 | Fox RICHARDSON | 9 | Co Lincoln P | 58.90 |
| 8 | 33 | Charles BLYTH | 11 | Lincoln Vulc | 58.59 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 34 | Charlie ARMSTRONG | 12 | Deepings | 58.30 |
| 2 | 35 | Lewis CLARKE | 12 | Co Lincoln P | 57.29 |
| 3 | 36 | Ethan MEHTA | 11 | Lincoln Vulc | 57.26 |
| 4 | 37 | Ralph MILNE | 10 | Grantham | 57.14 |
| 5 | 38 | Henry LEONARD | 9 | Grantham | 56.04 |
| 6 | 39 | George Arthur PYKE | 12 | Gainsborough | 55.00 |
| 7 | 40 | Zhengxi (John) GUO | 9 | Grantham | 54.71 |
| 8 | 41 | Benjamin BROWN | 10 | Deepings | 54.69 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 42 | Siddharth SUTHAN | 11 | Co Lincoln P | 54.30 |
| 2 | 43 | Rory MACKFALL | 12 | Lincoln Vulc | 53.41 |
| 3 | 44 | Felix THORNDIKE | 9 | Lincoln Vulc | 52.81 |
| 4 | 45 | Max ELDRIDGE | 12 | Co Lincoln P | 52.61 |
| 5 | 46 | Zac RHOADES | 12 | Co Lincoln P | 52.35 |
| 6 | 47 | Oliver PYGOTT-HAMMOND | 10 | Grantham | 52.34 |
| 7 | 48 | Liam EDMEADES | 10 | Deepings | 52.32 |
| 8 | 49 | George DOLAN | 9 | Grantham | 51.95 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 50 | Harrison ABLITT | 11 | Co Lincoln P | 51.90 |
| 2 | 51 | Ksawery WRONSKI | 12 | Co Lincoln P | 51.45 |
| 3 | 52 | Joshua FORSYTH | 12 | Lincoln Vulc | 51.37 |
| 4 | 53 | Alex HUCKLE | 9 | Co Lincoln P | 51.30 |
| 5 | 54 | Ethan PEART | 10 | Deepings | 50.73 |
| 6 | 55 | Finley RUSHTON | 12 | Co Lincoln P | 50.00 |
| 7 | 56 | Daniel GODDARD | 11 | Grantham | 49.38 |
| 8 | 57 | William PENNOCK | 12 | Grantham | 49.16 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 59 | Freddie HIRST | 11 | Grantham | 46.32 |
| 2 | 61 | Derrin BROCKLEBANK | 12 | Grantham | 45.38 |
| 3 | 63 | Markas PARAPIJONAVICIU | 12 | Grantham | 40.62 |
| 4 | 65 | Henry DOLAN | 12 | Grantham | 38.92 |
| 5 | 64 | Toby EDMONDSON | 11 | Grantham | 40.29 |
| 6 | 62 | Louis WRIGHT | 12 | Grantham | 43.22 |
| 7 | 60 | Zachary TOMLINSON | 12 | Co Lincoln P | 46.15 |
| 8 | 58 | Tom BARRATT | 11 | Gainsborough | 48.13 |