EVENT 101 Female 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Tali WILMSHURST | 13 | Haringey | |
| 4 | 3 | Libby FLITTON | 11 | Dunstable | |
| 5 | 2 | Emily BRATILESCU | 11 | Newport Pag | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 6 | Ella BAKER | 11 | TigersJersey | |
| 3 | 8 | Rahil ABWOOLI | 10 | TigersJersey | |
| 4 | 10 | Adel TONKO | 11 | TigersJersey | 7:17.00 |
| 5 | 9 | Annabella KERRY | 13 | Verulam | |
| 6 | 7 | Chloe MATTHEWS | 12 | Linslade | |
| 7 | 5 | Sophie WOOD | 11 | Linslade | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Charlotte STOCKS | 11 | Linslade | 6:21.93 |
| 2 | 14 | Olivia COOPER | 15 | Dunstable | 6:05.44 |
| 3 | 16 | Florence WHITTAKER | 13 | Biggleswade | 6:01.65 |
| 4 | 18 | Summer EVASON | 14 | Watford SC | 5:27.70 |
| 5 | 17 | Julia STRZEZEK | 12 | TigersJersey | 5:59.80 |
| 6 | 15 | Niamh CHURCH | 12 | TigersJersey | 6:02.50 |
| 7 | 13 | Emilie HIGGS | 14 | Newport Pag | 6:15.10 |
| 8 | 11 | Clara LEON | 12 | Team Luton | 6:39.90 |