EVENT 734 Girl 11/14 Yrs 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Elizabeth Feld | 12 | Chelmsford | 6:28.04 |
| 3 | 3 | Niamh Bunker | 12 | Flitwick | 6:23.76 |
| 4 | 5 | Ella Deaton | 13 | Newmarket | 6:09.37 |
| 5 | 4 | Hollie Gilbertson | 13 | Co Norwich | 6:14.10 |
| 6 | 2 | Emilia Coster | 12 | Hatfield | 6:23.90 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 7 | M Tramontano Wells | 13 | Hertford | 6:07.97 |
| 2 | 9 | E Barth-Wehrenalp | 12 | Basildon Ph | 6:03.05 |
| 3 | 11 | Yasmine Ollerenshaw | 13 | Flitwick | 6:00.36 |
| 4 | 13 | Francesca Barber | 13 | Stowmarket | 5:59.62 |
| 5 | 12 | Jemima Lashmar | 13 | teamipswich | 5:59.81 |
| 6 | 10 | Jasmine Christmas | 13 | Co Cambridge | 6:02.61 |
| 7 | 8 | Sofia Andre-Barrett | 13 | Co Cambridge | 6:05.39 |
| 8 | 6 | Bethany Rumsby | 13 | Norwich Swan | 6:08.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 15 | I Stratton-Thomsett | 13 | Colchester | 5:55.20 |
| 2 | 17 | Briar Price | 13 | Putteridge | 5:49.70 |
| 3 | 19 | Jasmine Hall | 12 | Basildon Ph | 5:46.43 |
| 4 | 21 | Alice Watts | 14 | Co Cambridge | 5:44.77 |
| 5 | 20 | Lois Smith | 12 | Basildon Ph | 5:45.09 |
| 6 | 18 | Charlisse Harding | 13 | Norwich Swan | 5:49.60 |
| 7 | 16 | Lily Murrell | 13 | Norwich Swan | 5:51.56 |
| 8 | 14 | Eveline Gaydon | 13 | teamipswich | 5:56.02 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Abigail Riches | 14 | Co Norwich | 5:44.23 |
| 2 | 25 | Ella Greatbatch | 14 | Bishop Stort | 5:42.20 |
| 3 | 27 | Amelia Saunders | 14 | Leiston | 5:37.60 |
| 4 | 29 | Gabriella Troman | 13 | Colchester | 5:36.84 |
| 5 | 28 | Weronika Mikolajewska | 14 | Co Peterboro | 5:37.20 |
| 6 | 26 | Bethany Crawley | 14 | teamipswich | 5:37.98 |
| 7 | 24 | Georgina Hamilton | 14 | Co St Albans | 5:43.57 |
| 8 | 22 | Kiera Broad | 14 | West Suffolk | 5:44.69 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 31 | Gabriella Meyer | 13 | Chelmsford | 5:35.47 |
| 2 | 33 | Isla Hamilton | 14 | Norwich Swan | 5:31.50 |
| 3 | 35 | Olivia Mahoney | 14 | Co Peterboro | 5:29.63 |
| 4 | 37 | Gracie Parker | 14 | Basildon Ph | 5:16.91 |
| 5 | 36 | Chloe Barnard | 13 | Basildon Ph | 5:20.41 |
| 6 | 34 | Olivia Minett | 14 | Co Peterboro | 5:29.79 |
| 7 | 32 | Poppy Magill | 14 | Putteridge | 5:34.30 |
| 8 | 30 | Annie McLeod | 14 | Putteridge | 5:35.60 |