EVENT 201 Mixed 09 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Olivia KING | 14 | Deepings | |
| 4 | 2 | Charlie ARMSTRONG | 12 | Deepings | |
| 5 | 3 | Ava-Grace GREGORY | 14 | Grantham | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Isaac RHOADES | 12 | Co Lincoln P | |
| 2 | 5 | Kieron TOMS | 16 | Deepings | |
| 3 | 6 | Ethan PEART | 11 | Deepings | |
| 4 | 7 | Ava MORGAN | 12 | Co Lincoln P | 7:40.00 |
| 5 | 8 | Jenson FRANCIS-SWABY | 10 | Co Lincoln P | 7:40.00 |
| 6 | 9 | Fox RICHARDSON | 10 | Co Lincoln P | 7:40.00 |
| 7 | 10 | Alex HUCKLE | 10 | Co Lincoln P | 7:40.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Izabelle BURTON | 11 | Newark | 7:38.98 |
| 2 | 12 | Florence MCCLURE | 11 | Lincoln TSA | 7:20.00 |
| 3 | 13 | Emmeline GLEAVE | 11 | Grantham | 7:10.54 |
| 4 | 14 | Matias MIGLIORINO | 10 | Newark | 7:00.00 |
| 5 | 15 | Juliette KIM | 11 | Newark | 7:00.00 |
| 6 | 16 | Madeline SURTEES | 13 | Grantham | 6:55.49 |
| 7 | 17 | Michelle ZOLDOWICZ | 13 | Lincoln TSA | 6:55.00 |
| 8 | 18 | Harrison ABLITT | 11 | Co Lincoln P | 6:46.20 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Charlotte BROWNLESS | 14 | Lincoln TSA | 6:40.00 |
| 2 | 20 | Elizabeth FAHEY | 12 | Newark | 6:35.16 |
| 3 | 21 | Hoby CARR | 14 | Co Lincoln P | 6:32.68 |
| 4 | 22 | Eva MADDISON | 12 | Co Lincoln P | 6:30.00 |
| 5 | 23 | Alice MCMASTER | 15 | Co Lincoln P | 6:29.94 |
| 6 | 24 | Luiza KOZIOL | 18 | Lincoln TSA | 6:16.21 |
| 7 | 25 | Derrin BROCKLEBANK | 12 | Grantham | 6:15.66 |
| 8 | 26 | Honey FLOWER | 12 | Grantham | 6:14.60 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 27 | Joshua KIM | 13 | Grantham | 6:13.31 |
| 2 | 28 | Eva ENRIGHT | 14 | Co Lincoln P | 6:11.60 |
| 3 | 29 | Lucy ABBOTT | 14 | Grantham | 6:05.22 |
| 4 | 30 | Haiden IP | 13 | Newark | 6:02.90 |
| 5 | 31 | Toby EDMONDSON | 12 | Grantham | 5:51.17 |
| 6 | 32 | Remi BERRY | 13 | Co Lincoln P | 5:51.12 |
| 7 | 33 | Henry DOLAN | 13 | Grantham | 5:48.63 |
| 8 | 34 | Amy TAYLOR | 15 | Grantham | 5:35.47 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 36 | Annabelle JAY | 14 | Grantham | 5:29.75 |
| 2 | 38 | Oliver WILKINSON | 14 | Co Lincoln P | 5:23.05 |
| 3 | 40 | Grace MACDONALD | 17 | Grantham | 5:04.32 |
| 4 | 42 | Lilli-Rose CARR | 17 | Co Lincoln P | 4:57.72 |
| 5 | 41 | Theo RICHARDS | 16 | Co Lincoln P | 4:58.03 |
| 6 | 39 | Grace TURNER | 19 | Grantham | 5:04.55 |
| 7 | 37 | Isla GRAY | 16 | Grantham | 5:26.57 |
| 8 | 35 | George LEONARD | 14 | Grantham | 5:33.70 |