EVENT 109 Female 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Connie PITTS | 12 | Lincoln Vulcans SC | 7:13.04 |
| 3 | 4 | Louise HERRIOTT | 12 | South Lincs Competitive SC | 7:00.21 |
| 4 | 3 | Sophie HARRISON | 13 | Deepings SC | 7:00.32 |
| 5 | 1 | Annabel FYSON | 12 | South Lincs Competitive SC | 7:43.39 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Yuki HE | 13 | Gainsborough Dolphins SC | 6:45.43 |
| 2 | 8 | Sophie OWEN | 11 | Lincoln Vulcans SC | 6:40.84 |
| 3 | 10 | Robyn STEEL | 10 | City of Linc Pentaqua SC | 6:33.07 |
| 4 | 9 | Florence EARNSHAW | 12 | Lincoln Vulcans SC | 6:35.00 |
| 5 | 7 | Evangeline CHRISPIN | 12 | Lincoln Vulcans SC | 6:40.97 |
| 6 | 5 | Imogen ROTHWELL | 12 | City of Linc Pentaqua SC | 7:00.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Sophie BOLTON | 12 | South Lincs Competitive SC | 6:05.35 |
| 2 | 14 | Bronte EASEY | 11 | Bassetlaw Swim Squad | 6:00.70 |
| 3 | 16 | Florence HENDERSON | 11 | Lincoln Vulcans SC | 5:52.23 |
| 4 | 15 | Isla-Rose WILDISH | 10 | Bassetlaw Swim Squad | 5:52.64 |
| 5 | 13 | Eve MONAGHAN | 12 | Bassetlaw Swim Squad | 6:05.13 |
| 6 | 11 | Annabel SHEPHERD | 11 | Deepings SC | 6:32.43 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Millie POOLE | 13 | City of Linc Pentaqua SC | 5:46.58 |
| 2 | 20 | Emma ARTHUR | 15 | City of Linc Pentaqua SC | 5:44.71 |
| 3 | 22 | Anna SIMMONS | 15 | Lincoln Vulcans SC | 5:35.70 |
| 4 | 21 | Remi-leigh BERRY | 11 | City of Linc Pentaqua SC | 5:35.71 |
| 5 | 19 | Peyton BRIGHT | 12 | Lincoln Vulcans SC | 5:44.99 |
| 6 | 17 | Evie NEWMAN | 11 | Lincoln Vulcans SC | 5:51.68 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Eleanor BIRINY | 13 | Lincoln Vulcans SC | 5:30.00 |
| 2 | 26 | Isla STOCKLEY | 11 | Bassetlaw Swim Squad | 5:24.59 |
| 3 | 28 | Sophie MARSHALL | 18 | City of Linc Pentaqua SC | 5:20.35 |
| 4 | 27 | Eydee CHILVERS | 13 | South Lincs Competitive SC | 5:21.05 |
| 5 | 25 | Isla SCOTT | 13 | Lincoln Vulcans SC | 5:24.64 |
| 6 | 23 | Iris FRENCH | 13 | Lincoln Vulcans SC | 5:32.78 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 30 | Pela TIAN-WRIGHT | 13 | South Lincs Competitive SC | 5:15.63 |
| 2 | 32 | Isobelle RAFFERTY | 12 | Bassetlaw Swim Squad | 5:01.59 |
| 3 | 34 | Alexandra BULAT | 17 | City of Linc Pentaqua SC | 4:23.78 |
| 4 | 33 | Evie LILLEY | 14 | Bassetlaw Swim Squad | 4:47.43 |
| 5 | 31 | Charlotte JENKINSON | 13 | Deepings SC | 5:08.32 |
| 6 | 29 | Starla HOPE | 13 | Bassetlaw Swim Squad | 5:16.03 |