EVENT 101 Mixed 09 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Hollie-Ann CROOK | 11 | Grantham | 7:32.70 |
| 2 | 2 | Freddie HIRST | 11 | Grantham | 7:26.42 |
| 3 | 3 | Hannah EXLEY | 11 | Grantham | 7:20.00 |
| 4 | 4 | Derrin BROCKLEBANK | 11 | Grantham | 7:11.43 |
| 5 | 5 | Octavia SHEARN | 13 | Grantham | 7:00.00 |
| 6 | 6 | William PENNOCK | 11 | Grantham | 6:50.00 |
| 7 | 7 | Louis WRIGHT | 12 | Grantham | 6:48.00 |
| 8 | 8 | Henry DOLAN | 12 | Grantham | 6:44.73 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | George LEONARD | 13 | Grantham | 6:43.61 |
| 2 | 10 | Toby EDMONDSON | 11 | Grantham | 6:43.56 |
| 3 | 11 | Joshua KIM | 13 | Grantham | 6:37.94 |
| 4 | 12 | Isabelle CLAYTON | 13 | Grantham | 6:36.84 |
| 5 | 13 | Ella KHAMA | 11 | Grantham | 6:35.00 |
| 6 | 14 | Lucy ABBOTT | 13 | Grantham | 6:24.35 |
| 7 | 15 | Markas PARAPIJONAVICIU | 12 | Grantham | 6:15.00 |
| 8 | 16 | Lizzy LERESCHE HANDS | 14 | Grantham | 6:14.41 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Lexie SHEWAN | 15 | Grantham | 6:08.38 |
| 2 | 18 | Thomas HILLSON | 12 | Grantham | 6:08.16 |
| 3 | 19 | Jimmin BAO | 12 | Grantham | 6:08.13 |
| 4 | 20 | Grace HOWITT | 16 | Grantham | 5:59.42 |
| 5 | 21 | Ellena HOWITT | 14 | Grantham | 5:56.10 |
| 6 | 22 | Amy TAYLOR | 14 | Grantham | 5:42.67 |
| 7 | 23 | Sophie WARD | 16 | Grantham | 5:42.40 |
| 8 | 24 | Annabelle JAY | 14 | Grantham | 5:37.85 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Isla GRAY | 15 | Grantham | 5:26.57 |
| 2 | 28 | Ben CARLYLE | 15 | Grantham | 5:06.83 |
| 3 | 30 | Grace MACDONALD | 16 | Grantham | 5:01.59 |
| 4 | 32 | Jacob FISH | 16 | Grantham | 4:51.84 |
| 5 | 31 | Zach HOPKINSON | 16 | Grantham | 4:56.10 |
| 6 | 29 | Grace TURNER | 18 | Grantham | 5:04.55 |
| 7 | 27 | Chloe HOPKINSON | 20 | Grantham | 5:16.92 |
| 8 | 25 | Lucy WILLATTS | 14 | Grantham | 5:34.08 |