EVENT 201 Boys/Girls 10 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Lottie Ava FLATTERS | 11 | Deepings | 8:04.20 |
| 4 | 2 | Rowan SMITH | 10 | Deepings | 8:00.00 |
| 5 | 3 | Lucy WILLATTS | 12 | Grantham | 7:17.76 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | George LEONARD | 11 | Grantham | 7:00.00 |
| 2 | 5 | Ellena HOWITT | 12 | Grantham | 6:53.70 |
| 3 | 6 | Charlotte JENKINSON | 13 | Deepings | 6:49.15 |
| 4 | 8 | Grace HOWITT | 14 | Grantham | 6:31.11 |
| 5 | 9 | Jessica-Rose DAVISON | 14 | Grantham | 6:28.52 |
| 6 | 10 | Oscar DURANT | 12 | Grantham | 6:27.04 |
| 7 | 11 | Fabian KOLASA | 12 | Grantham | 6:27.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Oliver GARNER | 13 | Co Lincoln P | 6:25.82 |
| 2 | 14 | Theo BACON | 13 | Grantham | 6:15.00 |
| 3 | 15 | Alice ROBINSON | 13 | Co Cambridge | 6:09.46 |
| 4 | 16 | Corey FARLEY | 14 | Deepings | 6:08.70 |
| 5 | 17 | Stansie CROWE | 12 | Bircotes SC | 6:06.72 |
| 6 | 18 | Charlotte HODGIN | 15 | Co Lincoln P | 6:06.65 |
| 7 | 19 | Sophie MARSHALL | 18 | Co Lincoln P | 6:00.00 |
| 8 | 20 | Maddison HODGIN | 13 | Co Lincoln P | 6:00.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 22 | Abigail BETTS | 13 | Bircotes SC | 5:59.63 |
| 2 | 24 | Daniel HEPPLESTONE | 13 | Co Lincoln P | 5:51.75 |
| 3 | 27 | Gracie-May COLE | 15 | Co Lincoln P | 5:41.11 |
| 4 | 31 | Owen HATHWAY | 17 | Grantham | 4:54.70 |
| 5 | 29 | Zach HOPKINSON | 14 | Grantham | 5:11.28 |
| 6 | 25 | Gareth COCKS | 34 | Co Lincoln P | 5:50.00 |
| 7 | 23 | Samuel POTTER | 13 | Bircotes SC | 5:53.59 |
| 8 | 21 | Emma ARTHUR | 15 | Co Lincoln P | 6:00.00 |