EVENT 203 Female 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Nora CULLUM | 10 | Co Leeds | 1:56.00 |
| 4 | 3 | Tilly OSBORN | 10 | Co Leeds | 1:55.00 |
| 5 | 2 | Kitty KIRKLEY | 9 | Co Leeds | 1:55.02 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Latika MEHTA | 11 | Co Leeds | 1:50.00 |
| 2 | 7 | Paige ROBERTSON | 10 | Co Leeds | 1:47.00 |
| 3 | 9 | Harper COOPER | 10 | Co Leeds | 1:45.50 |
| 4 | 11 | Hattie KEELER | 11 | Co Leeds | 1:42.10 |
| 5 | 10 | Karina MIHAILOVA | 11 | Co Leeds | 1:45.00 |
| 6 | 8 | Phoebe JACKSON | 10 | Co Leeds | 1:46.80 |
| 7 | 6 | Lucy HOLLOWAY | 11 | Co Leeds | 1:47.60 |
| 8 | 4 | Edie BARKER | 10 | Co Leeds | 1:50.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 13 | Greta JEGERS | 11 | Co Leeds | 1:39.50 |
| 1 | 15 | Ilapreet Kaur TWEDDLE | 10 | Co Leeds | 1:33.10 |
| 2 | 17 | Sophia KOK | 12 | Co Leeds | 1:32.70 |
| 3 | 19 | Hannah HEPBURN-WOOD | 11 | Co Leeds | 1:31.54 |
| 4 | 21 | Lily HOGAN | 11 | Co Leeds | 1:30.00 |
| 5 | 20 | Stella BOWES | 10 | Co Leeds | 1:30.00 |
| 6 | 18 | Niamh SUTCLIFFE | 11 | Co Leeds | 1:32.30 |
| 7 | 16 | Olivia HAN | 11 | Co Leeds | 1:33.03 |
| 8 | 14 | Gracie HART | 11 | Co Leeds | 1:37.00 |
| 9 | 12 | Annabeth CHEUNG | 10 | Co Leeds | 1:40.60 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 23 | Emily Rose GARRICK | 10 | Co Leeds | 1:28.70 |
| 1 | 25 | Arina MIHAILOVA | 11 | Co Leeds | 1:27.00 |
| 2 | 27 | Lola MALCOLM | 10 | Co Leeds | 1:24.80 |
| 3 | 29 | Matilda PENNELLS | 11 | Co Leeds | 1:23.60 |
| 4 | 31 | Erin HARGREAVES | 13 | Co Leeds | 1:21.10 |
| 5 | 30 | Evie MORAN | 13 | Co Leeds | 1:22.10 |
| 6 | 28 | Ayla CARRY | 13 | Co Leeds | 1:24.20 |
| 7 | 26 | Elizabeth ROTHWELL | 12 | Co Leeds | 1:26.76 |
| 8 | 24 | Matilda SHERLEY-PRICE | 11 | Co Leeds | 1:28.08 |
| 9 | 22 | A STANISZEWSKA-SCONTUS | 12 | Co Leeds | 1:28.70 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 33 | Isabelle JORDAN | 11 | Co Leeds | 1:19.60 |
| 1 | 35 | Amelia MATSON | 14 | Co Leeds | 1:18.60 |
| 2 | 37 | Sophie LEWIS | 12 | Co Leeds | 1:17.20 |
| 3 | 39 | Daisy GLOVER | 15 | Co Leeds | 1:15.90 |
| 4 | 41 | Qian SHEN | 12 | Co Leeds | 1:12.80 |
| 5 | 40 | Madeleine FLAHERTY | 13 | Co Leeds | 1:13.60 |
| 6 | 38 | Anna GLOSEK | 14 | Co Leeds | 1:16.70 |
| 7 | 36 | Emma GLOSEK | 12 | Co Leeds | 1:18.50 |
| 8 | 34 | Verity LILLEY | 14 | Co Leeds | 1:19.20 |
| 9 | 32 | Isabelle PARK | 13 | Co Leeds | 1:19.90 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 43 | Evie THORPE | 14 | Co Leeds | 1:11.30 |
| 1 | 45 | Erin BENTLEY | 15 | Co Leeds | 1:09.70 |
| 2 | 47 | Darcey BLACKER | 18 | Co Leeds | 1:06.75 |
| 3 | 49 | Jessica ROLLINGS | 15 | Co Leeds | 1:04.20 |
| 4 | 51 | Ella MCDERMOTT | 18 | Co Leeds | 1:02.60 |
| 5 | 50 | Emily ENGLAND-HALL | 14 | Co Leeds | 1:03.50 |
| 6 | 48 | Florence DIXON | 15 | Co Leeds | 1:06.00 |
| 7 | 46 | Addison CROPPER | 13 | Co Leeds | 1:09.00 |
| 8 | 44 | Willow WRIGHT | 13 | Co Leeds | 1:10.30 |
| 9 | 42 | Neve STAFFORD | 13 | Co Leeds | 1:11.70 |