EVENT 111 Men/Women 11 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Daisy Stimpson | 13 | West Norfolk | 6:27.10 |
| 3 | 4 | Barnaby O'Donnell | 14 | Bushey | 6:00.21 |
| 4 | 6 | Autumn Shine | 15 | Potters Bar | 5:57.26 |
| 5 | 5 | Oscar Sherwani | 14 | Flitwick | 5:59.20 |
| 6 | 3 | Max Lesner | 13 | Potters Bar | 6:25.70 |
| 7 | 1 | Emma Dye | 12 | Norwich Swan | 6:37.30 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Leah Mason | 14 | Colchester | 5:54.99 |
| 2 | 10 | Holly Larbey | 15 | Putteridge | 5:50.60 |
| 3 | 12 | Julia Swanepoel | 17 | Epping For't | 5:48.63 |
| 4 | 14 | Ella Greatbatch | 14 | Bishop Stort | 5:46.60 |
| 5 | 13 | Ava Black | 15 | Co St Albans | 5:47.64 |
| 6 | 11 | Scarlett Joslin | 15 | Co Cambridge | 5:49.67 |
| 7 | 9 | Sadie Rowe | 15 | Colchester | 5:52.00 |
| 8 | 7 | Florence Talbot | 15 | Newmarket | 5:56.33 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 16 | Nathan Yeaman | 15 | West Norfolk | 5:40.70 |
| 2 | 18 | Tamsin Moren | 17 | Berkhamsted | 5:34.18 |
| 3 | 20 | Oliver Rana-Beadle | 17 | St Ives | 5:29.20 |
| 4 | 22 | Harvey Isle | 17 | West Norfolk | 5:11.80 |
| 5 | 21 | Austin Harrop | 16 | Co Cambridge | 5:26.45 |
| 6 | 19 | Emily Cutting | 17 | West Suffolk | 5:31.50 |
| 7 | 17 | Ruby Chapman | 16 | Norwich Swan | 5:37.70 |
| 8 | 15 | Esmie Kidman | 16 | West Norfolk | 5:42.39 |