EVENT 403 Girls 10 Yrs/Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Abigail AYLING | 13 | Co Cambridge | 1:37.99 |
| 2 | 2 | Grace MASON | 11 | Bishop Stort | 1:37.82 |
| 3 | 3 | Heidi BRUGGRABER | 11 | Co Cambridge | 1:37.46 |
| 4 | 4 | Jaymee WARDELL | 11 | Bishop Stort | 1:34.17 |
| 5 | 5 | Charisma CHANG | 12 | Co Cambridge | 1:33.96 |
| 6 | 6 | Emily CUTTING | 12 | West Suffolk | 1:31.66 |
| 7 | 7 | Evie WHITFIELD | 11 | Grantham | 1:29.48 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 8 | Grace TURNER | 10 | Grantham | 1:28.54 |
| 2 | 9 | Anouk ZECCHINI | 11 | Co Cambridge | 1:27.22 |
| 3 | 10 | Rosie BELCHER | 14 | Grantham | 1:27.14 |
| 4 | 11 | Emily WILLIAMS | 13 | St Neot Swan | 1:26.89 |
| 5 | 12 | Sophie LEDGER | 12 | Hatfield | 1:25.25 |
| 6 | 13 | Grace ROBERTS | 11 | Co Cambridge | 1:24.96 |
| 7 | 14 | Jessica BLOOMFIELD | 12 | Co Cambridge | 1:24.21 |
| 8 | 15 | Lauren HAMMOND | 12 | Co Cambridge | 1:21.85 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 39 | Macy DEXTER | 12 | Co Cambridge | 1:21.75 |
| 2 | 16 | Rosanna SNOOK | 14 | Royston | 1:20.50 |
| 3 | 17 | Mia HUCKSTEP | 14 | West Suffolk | 1:20.41 |
| 4 | 18 | Lucy PARKER | 12 | Skegness | 1:19.12 |
| 5 | 19 | Sophie FOWLER | 12 | C Beds SS | 1:18.74 |
| 6 | 20 | Molly BRUNDLE | 13 | Royston | 1:18.59 |
| 7 | 21 | Mali JONGMAN-RIOS | 13 | Co Cambridge | 1:18.00 |
| 8 | 22 | Marni SILLITOE | 13 | West Suffolk | 1:17.17 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 23 | Daisy WILSON | 13 | Co Cambridge | 1:17.14 |
| 2 | 24 | Chloe COOK | 13 | March | 1:16.41 |
| 3 | 25 | Faith ASHWORTH STOBBS | 13 | Co Cambridge | 1:15.58 |
| 4 | 26 | Brianna RUARK | 13 | West Suffolk | 1:15.41 |
| 5 | 27 | Lucy HUDSON | 13 | West Suffolk | 1:15.11 |
| 6 | 28 | Orla KENNY | 12 | Co Cambridge | 1:14.29 |
| 7 | 29 | Matilda RANSOME | 11 | Co Cambridge | 1:14.19 |
| 8 | 30 | Jenna MARRIOTT | 13 | Calv Bing | 1:13.59 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 32 | Cerys WILLIAMS | 13 | West Suffolk | 1:12.81 |
| 2 | 34 | Polly FISH | 13 | Co Cambridge | 1:11.40 |
| 3 | 36 | Almudena VISSER VELEZ | 16 | Co Cambridge | 1:11.12 |
| 4 | 38 | Lauren THOMAS | 16 | C Beds SS | 1:06.70 |
| 5 | 37 | Peyton EWBANK | 17 | Norwich Swan | 1:09.16 |
| 6 | 35 | Hannah ADAMS | 15 | Co Cambridge | 1:11.24 |
| 7 | 33 | Charlotte HUDSON | 15 | West Suffolk | 1:12.00 |
| 8 | 31 | Gracie KAY | 14 | Co Cambridge | 1:13.00 |