EVENT 117 Womens 400m Freestyle - Heats
Not Competing : 7
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 2 | Alice FENDER | 15 | Hemel Hemp | 4:39.64 |
| 4 | 4 | Madeleine CHAMBERS | 16 | St Felix Sch | 4:38.27 |
| 5 | 3 | Megan KEY | 15 | Canvey Isl | 4:38.34 |
| 6 | 1 | Sonia TUMIOTTO | 15 | St Felix Sch | 4:41.60 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 6 | Amber SHINE | 16 | Hatfield | 4:37.32 |
| 2 | 9 | Ellie MITCHELL | 17 | Runnymede | 4:34.01 |
| 3 | 11 | Rebecca SCOTT | 18 | Hitchin | 4:33.10 |
| 4 | 13 | Holly JASZKIEWICZ | 15 | Co Peterboro | 4:32.80 |
| 5 | 12 | Maddison SAUNDERS | 15 | Co Peterboro | 4:32.97 |
| 6 | 10 | Aisling RUFF | 18 | Co Peterboro | 4:33.30 |
| 7 | 8 | Sophie TAYLOR | 15 | St Felix Sch | 4:34.75 |
| 8 | 5 | Chloe OGDEN | 15 | Bishop Stort | 4:37.70 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 15 | Shannon STOTT | 16 | Co St Albans | 4:32.21 |
| 2 | 17 | Millie EMMANS | 17 | Co Cambridge | 4:30.80 |
| 3 | 19 | Amy YOUNG | 17 | Bishop Stort | 4:30.23 |
| 4 | 21 | Tilly ANEMA | 15 | Norwich Swan | 4:29.45 |
| 5 | 20 | Chantal SMITH | 16 | Team Luton | 4:29.87 |
| 6 | 18 | Poppy RICHARDSON | 15 | Co Peterboro | 4:30.60 |
| 7 | 16 | Emily DOWDING | 18 | teamipswich | 4:31.19 |
| 8 | 14 | Jessica WESTLAKE | 17 | St Felix Sch | 4:32.80 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 23 | Christie WOODS | 16 | Co Peterboro | 4:28.04 |
| 2 | 25 | Chloe LENCE | 15 | Modernians | 4:26.30 |
| 3 | 27 | Leah ROUGHAN | 17 | Co Peterboro | 4:24.80 |
| 4 | 29 | Abby SMITH | 20 | Harpenden | 4:15.90 |
| 5 | 28 | Nicola PASQUIRE | 18 | Team Luton | 4:22.45 |
| 6 | 26 | Dolly TRIGG | 18 | teamipswich | 4:26.12 |
| 7 | 24 | Amber HUGHES | 17 | Hatfield | 4:26.88 |
| 8 | 22 | Tegan WOLLASTON | 17 | Cheshunt | 4:28.72 |