EVENT 506 Female 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 1 | Scarlett Humphrey | 19 | S11 | Northampton | 1:19.70 |
| 2 | 3 | Philippa Bodey | 13 | | Co Leicester | 1:08.80 |
| 3 | 5 | Chiara Reedha | 15 | | Co Leicester | 1:08.35 |
| 4 | 7 | Clara Ginnis | 17 | | Repton | 1:07.78 |
| 5 | 6 | C Callaghan-Wetton | 15 | | Nova Cent'n | 1:08.09 |
| 6 | 4 | I Parsons-Loades | 13 | | Repton | 1:08.36 |
| 7 | 2 | Connie Rennard | 16 | | Repton | 1:09.10 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 9 | Anna Clarke | 15 | | Co Leicester | 1:07.59 |
| 2 | 11 | Evelyn Connor | 14 | | Ripley | 1:07.40 |
| 3 | 13 | Emily Parkins | 17 | | Nova Cent'n | 1:07.15 |
| 4 | 15 | Orna Lett | 14 | | Northampton | 1:07.10 |
| 5 | 14 | Rosie Smith | 20 | | Uni of Nott | 1:07.11 |
| 6 | 12 | Jessica Robinson | 16 | | Nova Cent'n | 1:07.20 |
| 7 | 10 | Millie King | 16 | | Derby Excel | 1:07.40 |
| 8 | 8 | Daisy Dunton | 15 | | Repton | 1:07.60 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 17 | Jessica Lines | 15 | | Co Leicester | 1:06.63 |
| 2 | 19 | Eleanor Bevan | 18 | | Derby Excel | 1:06.13 |
| 3 | 21 | Ellie Tennant | 23 | | Long Eaton | 1:05.71 |
| 4 | 23 | Jasmine Vaartjes | 15 | | Repton | 1:05.30 |
| 5 | 22 | Elodie Pearcey | 15 | | Repton | 1:05.70 |
| 6 | 20 | Jessica Oxley | 15 | | Co Leicester | 1:06.00 |
| 7 | 18 | Grace Macdonald | 15 | | Grantham | 1:06.37 |
| 8 | 16 | Kyra Winter | 13 | | Chesterfield | 1:06.73 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 27 | Katie Maloney | 27 | | Louth | 1:04.44 |
| 2 | 33 | Annabelle Wilkinson | 19 | | Chesterfield | 1:03.80 |
| 3 | 39 | Helen Sharratt | 18 | | DerbyPhoenix | 1:01.80 |
| 4 | 45 | Betsy Wizard | 21 | | Northampton | 58.54 |
| 5 | 42 | Abbie Wood | 25 | | Lboro Uni | 1:00.00 |
| 6 | 36 | Alyssa Lo | 16 | | Co Leicester | 1:02.30 |
| 7 | 30 | Eva Bailey | 18 | | Lboro Uni | 1:04.14 |
| 8 | 24 | Lily Freeman | 17 | | Northampton | 1:05.30 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 28 | Francesca Harrison | 15 | | Co Leicester | 1:04.40 |
| 2 | 34 | Miley Aram | 15 | | Derby Excel | 1:03.50 |
| 3 | 40 | Medi Harris | 22 | | Lboro Uni | 1:01.00 |
| 4 | 46 | Georgina Pryor | 26 | | Derby Excel | 57.48 |
| 5 | 43 | Lucy Fox | 18 | | Lboro Uni | 59.94 |
| 6 | 37 | Jessica Smelt | 17 | | Repton | 1:02.28 |
| 7 | 31 | Asma Le Falher | 19 | | Lboro Uni | 1:04.06 |
| 8 | 25 | Alexandra Bulat | 18 | | Co Lincoln P | 1:04.88 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 29 | Olivia Anstey | 16 | | Louth | 1:04.36 |
| 2 | 35 | Elizabeth Booker | 23 | | Lboro Uni | 1:03.00 |
| 3 | 41 | Harriet Rogers | 20 | | Lboro Uni | 1:00.80 |
| 4 | 47 | Laura Stephens | 25 | | Lboro Uni | 57.40 |
| 5 | 44 | Eva Okaro | 18 | | Repton | 58.90 |
| 6 | 38 | Anna Stansfield | 21 | | Uni of Nott | 1:02.11 |
| 7 | 32 | Janie Finch | 14 | | Co Leicester | 1:03.82 |
| 8 | 26 | Olivia Beard | 16 | | Nova Cent'n | 1:04.60 |