EVENT 415 Womens 11/14 Yrs 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Natalie Tyler | 11 | Deben | 5:05.11 |
| 4 | 3 | Lyla Howard | 12 | Team Luton | 5:02.69 |
| 5 | 2 | Charlotte Shaw | 12 | Co Peterboro | 5:04.87 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 5 | Lily-Ella Mayall | 12 | Lstoft & OB | 5:01.25 |
| 2 | 7 | Amelie Crabb | 12 | teamipswich | 4:57.90 |
| 3 | 9 | Skye Carter | 12 | Basildon Ph | 4:57.12 |
| 4 | 11 | Elijah Britton | 13 | St Felix Sch | 4:56.61 |
| 5 | 10 | Lisa Leinemann | 12 | Chelmsford | 4:56.64 |
| 6 | 8 | Cait Cotter | 12 | Chelmsford | 4:57.24 |
| 7 | 6 | Rosalind Saise | 12 | teamipswich | 5:00.83 |
| 8 | 4 | Seren Page | 12 | teamipswich | 5:02.52 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 13 | Olivia Church | 13 | Basildon Ph | 4:55.78 |
| 2 | 15 | Alexa Mann | 13 | Basildon Ph | 4:54.36 |
| 3 | 17 | Phoebe White | 14 | Harlow Pen | 4:51.46 |
| 4 | 19 | Orla Kenny | 14 | Co Cambridge | 4:49.75 |
| 5 | 18 | Evangeline Pierce | 12 | Basildon Ph | 4:50.80 |
| 6 | 16 | Romilly Marks | 13 | Newmarket | 4:53.10 |
| 7 | 14 | Sophie Dowding | 12 | teamipswich | 4:55.18 |
| 8 | 12 | Charlotte Williams | 13 | Cheshunt | 4:56.31 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 21 | Sophie Lander | 14 | Deben | 4:49.11 |
| 2 | 23 | Leah Wightman | 14 | West Norfolk | 4:48.40 |
| 3 | 25 | Francesca Baber | 13 | C Beds SS | 4:47.67 |
| 4 | 27 | Holly Driver | 14 | St Felix Sch | 4:46.56 |
| 5 | 26 | Indy Scott | 14 | Co Cambridge | 4:46.80 |
| 6 | 24 | Jessica Shaw | 14 | Co Peterboro | 4:47.89 |
| 7 | 22 | Erin Wilkinson | 14 | Southend | 4:48.90 |
| 8 | 20 | Francesca Key | 14 | Canvey Isl | 4:49.66 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 29 | Bryony Edgings | 14 | Thurrock | 4:45.70 |
| 2 | 31 | Anastasia Wilkinson | 14 | Hatfield | 4:45.09 |
| 3 | 33 | Isabel Murtagh | 13 | Hatfield | 4:44.20 |
| 4 | 35 | Karys-Rose Bunn | 13 | teamipswich | 4:41.10 |
| 5 | 34 | Daisy Moxham | 14 | Co Cambridge | 4:42.50 |
| 6 | 32 | Valeria Giron | 14 | Hatfield | 4:44.30 |
| 7 | 30 | Kiera Blunden | 14 | Chelmsford | 4:45.60 |
| 8 | 28 | Lucy Young | 14 | Modernian | 4:45.80 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 37 | Ella Turner | 14 | Basildon Ph | 4:37.70 |
| 2 | 39 | Charlotte Norman | 14 | teamipswich | 4:36.62 |
| 3 | 41 | Matilda Bogle | 13 | teamipswich | 4:36.30 |
| 4 | 43 | Erin Little | 14 | Chelmsford | 4:25.80 |
| 5 | 42 | Ruby Wheeler | 13 | Basildon Ph | 4:30.00 |
| 6 | 40 | Holly Lamb | 14 | Southend | 4:36.50 |
| 7 | 38 | Ruby Greenhalf | 14 | Co Norwich | 4:37.50 |
| 8 | 36 | Maeve Pooley | 14 | Newmarket | 4:39.70 |