EVENT 833 Female 11/14 Yrs 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Elise Dotchin | 12 | Co St Albans | 6:17.50 |
| 2 | 4 | Eva Jackson | 12 | Flitwick | 6:16.10 |
| 3 | 6 | Sofia Sacoto | 12 | Co St Albans | 6:12.42 |
| 4 | 8 | Valeria Soldatihhina | 11 | West Norfolk | 6:05.50 |
| 5 | 7 | Lilly Franks | 12 | Thurrock | 6:11.40 |
| 6 | 5 | Summer Lewis | 12 | Colchester | 6:12.60 |
| 7 | 3 | Charlotte Stocks | 12 | Linslade | 6:17.30 |
| 8 | 1 | Olivia Pais | 12 | Co Peterboro | 6:18.71 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Polly Anderson | 12 | West Norfolk | 6:04.20 |
| 2 | 12 | Alice Buckingham | 11 | Team Luton | 6:02.30 |
| 3 | 14 | Olivia Croft | 13 | Cheshunt | 5:59.24 |
| 4 | 16 | Anna Mason | 12 | Co Peterboro | 5:57.20 |
| 5 | 15 | Madison Hicks | 13 | Wisbech | 5:58.59 |
| 6 | 13 | Cerys Wall | 12 | Co Cambridge | 6:01.50 |
| 7 | 11 | India Clement | 12 | West Suffolk | 6:02.80 |
| 8 | 9 | Summer Miller | 12 | Bishop Stort | 6:04.61 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Megan Randall | 13 | Royston | 5:53.89 |
| 2 | 20 | Charlotte Stewart | 12 | Co St Albans | 5:50.88 |
| 3 | 22 | Daisy Jubb | 14 | Co St Albans | 5:43.64 |
| 4 | 24 | Ava Sims | 13 | Chelmsford | 5:42.50 |
| 5 | 23 | Amira Khelfa | 13 | Basildon Ph | 5:43.35 |
| 6 | 21 | Chloe Cranny | 13 | Epping For't | 5:49.20 |
| 7 | 19 | Layla Jennings | 13 | Halstead | 5:51.43 |
| 8 | 17 | Isobel McKay | 13 | Epping For't | 5:56.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Devon O'Neil | 14 | Co Peterboro | 5:40.51 |
| 2 | 28 | Mia Wilson | 12 | Basildon Ph | 5:39.84 |
| 3 | 30 | Tyra Sajudeen | 14 | Co Cambridge | 5:35.28 |
| 4 | 32 | Kitty Lamb | 13 | Co Peterboro | 5:33.27 |
| 5 | 31 | Isla Stewart | 14 | Co Peterboro | 5:35.00 |
| 6 | 29 | Jasmine Scott | 13 | Co St Albans | 5:38.06 |
| 7 | 27 | Lucy Wilson | 14 | Co Peterboro | 5:40.18 |
| 8 | 25 | Freya May | 14 | Leiston | 5:41.04 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 34 | Milly Johnson | 14 | West Norfolk | 5:31.53 |
| 2 | 36 | Ayla Zolfaghari | 13 | Epping For't | 5:30.60 |
| 3 | 38 | Lois Smith | 14 | Basildon Ph | 5:17.14 |
| 4 | 40 | Jasmine Hall | 14 | Basildon Ph | 5:06.70 |
| 5 | 39 | Amelia Fenner | 14 | Basildon Ph | 5:09.50 |
| 6 | 37 | Emma Cushion | 14 | Co Peterboro | 5:21.86 |
| 7 | 35 | Jorja Atkinson | 13 | Co Cambridge | 5:31.50 |
| 8 | 33 | Freya Gyselings | 14 | Co Peterboro | 5:31.67 |