EVENT 203 Women 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Harriet Griffiths | 13 | RTW Monson | 1:10.17 |
| 2 | 3 | Eleanor Porter | 12 | Camden Swiss | 1:10.04 |
| 3 | 5 | Akemi Futatsugi | 13 | Co Bristol | 1:09.98 |
| 4 | 7 | Florence Dixon | 12 | Co Leeds | 1:09.75 |
| 5 | 6 | Liberty Jones | 13 | TauntonDeane | 1:09.86 |
| 6 | 4 | Tumininu Makinde | 13 | Millfield | 1:10.00 |
| 7 | 2 | Jessica Long | 12 | Bromley | 1:10.07 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 9 | Amelia Wright | 13 | Harrogate | 1:09.62 |
| 1 | 11 | Grace Yardley | 13 | Brompton | 1:09.47 |
| 2 | 13 | Jessica Oxley | 14 | Co Leicester | 1:09.01 |
| 3 | 15 | Mei Hayakawa | 13 | Barnet Copt | 1:08.99 |
| 4 | 17 | Lilly Lambert | 14 | Epsom Dist | 1:08.96 |
| 5 | 16 | Delilah Paisley | 13 | Chelsea&West | 1:08.97 |
| 6 | 14 | Elizabeth Annis | 14 | Pershore | 1:08.99 |
| 7 | 12 | Evie Sampson | 13 | Southport | 1:09.34 |
| 8 | 10 | Chiu Man Rachel Ho | 13 | Co Birm'ham | 1:09.57 |
| 9 | 8 | Olivia Norley | 13 | RTW Monson | 1:09.62 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 19 | Harriet Stone | 14 | Eastbourne | 1:08.74 |
| 1 | 21 | Janie Finch | 13 | Co Leicester | 1:08.67 |
| 2 | 23 | Amelia Fenner | 13 | Basildon Ph | 1:08.50 |
| 3 | 25 | Sienna Ramery | 14 | Wycombe Dist | 1:08.46 |
| 4 | 27 | Alexandra Nurney | 13 | Hatfield | 1:08.36 |
| 5 | 26 | Isabel Handley | 14 | Co Leeds | 1:08.40 |
| 6 | 24 | Victoria Hudson | 14 | Nuneaton | 1:08.49 |
| 7 | 22 | Isabella Arundell | 14 | Maidstone SC | 1:08.57 |
| 8 | 20 | Ever Ives | 14 | Hatfield | 1:08.69 |
| 9 | 18 | Elizabeth Warner | 13 | Co Leeds | 1:08.86 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 29 | Lilli-Rose Carr | 14 | Co Lincoln P | 1:08.30 |
| 1 | 31 | Mia Hughes | 14 | Bromley | 1:08.19 |
| 2 | 33 | Ava Truswell | 14 | Bracknell | 1:08.08 |
| 3 | 35 | E O'Halleron-Hutchinso | 16 | N & D PP SC | 1:07.88 |
| 4 | 37 | Ella Faulkner | 14 | Stockport Mo | 1:07.75 |
| 5 | 36 | Delilah Martin | 14 | Haslemere | 1:07.84 |
| 6 | 34 | Emma Bourgaize | 14 | Guernsey | 1:07.99 |
| 7 | 32 | Lucy Oliver | 14 | N & D PP SC | 1:08.09 |
| 8 | 30 | Jessica Gable | 16 | RTW Monson | 1:08.24 |
| 9 | 28 | Honey Robinson | 13 | N & D PP SC | 1:08.30 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 39 | Penelope Adamson | 16 | Co South'ton | 1:07.67 |
| 1 | 41 | Hannah Smith | 15 | Co Wakefield | 1:07.61 |
| 2 | 43 | Millie King | 15 | Derby Excel | 1:07.60 |
| 3 | 45 | Millie Harris | 15 | West Norfolk | 1:07.48 |
| 4 | 47 | Hannah Morris | 16 | Leyland Barr | 1:07.41 |
| 5 | 46 | Jasmine Shay | 15 | Co Bradford | 1:07.48 |
| 6 | 44 | Caitlin Maylor | 16 | Wigan BEST | 1:07.56 |
| 7 | 42 | Iris Hurst | 13 | Warrington W | 1:07.60 |
| 8 | 40 | Jessica Lines | 14 | Co Leicester | 1:07.66 |
| 9 | 38 | Lilly Deller | 14 | Dartford | 1:07.68 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 49 | Hollie Hawkins | 16 | Basildon Ph | 1:07.33 |
| 1 | 51 | Alexandra Rolls | 16 | Winchester | 1:07.29 |
| 2 | 53 | Hannah Day | 15 | Portsmouth N | 1:07.24 |
| 3 | 55 | Georgia Cowgill | 15 | Trafford Met | 1:07.17 |
| 4 | 57 | Evelyn Toy | 15 | Bristol Pen | 1:07.10 |
| 5 | 56 | Darcie Platts | 15 | Co Leicester | 1:07.15 |
| 6 | 54 | Hollie Whaymand | 15 | Maxwell | 1:07.22 |
| 7 | 52 | I Nightingale-Ellis | 15 | RTW Monson | 1:07.26 |
| 8 | 50 | Anna Miles-Simmonite | 15 | West Dorset | 1:07.31 |
| 9 | 48 | Eleni Ioannou | 16 | Co Oxford | 1:07.39 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 61 | Tiffany Latham | 15 | Royal Wolv | 1:06.99 |
| 1 | 67 | Asta Maddox | 15 | Millfield | 1:06.62 |
| 2 | 73 | Halle Harris | 16 | Poole | 1:06.29 |
| 3 | 79 | Molly Chambers | 21 | Co Sheffield | 1:04.00 |
| 4 | 85 | Jessica Mellor | 18 | Cosacss | 1:03.25 |
| 5 | 82 | Isabel Iley | 18 | Anaconda | 1:03.47 |
| 6 | 76 | Jennifer Green | 20 | Wigan BEST | 1:04.28 |
| 7 | 70 | Pippa Smyth | 16 | Rugby | 1:06.42 |
| 8 | 64 | Mia Matthews | 16 | Northampton | 1:06.75 |
| 9 | 58 | Zahra Fitzpatrick | 16 | Bristol Pen | 1:07.05 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 62 | Reza Westerduin | 16 | Crawley | 1:06.98 |
| 1 | 68 | Victoria Bunimovich | 16 | Chelsea&West | 1:06.62 |
| 2 | 74 | Sophia Gledhill | 16 | Co Bradford | 1:06.27 |
| 3 | 80 | Madison Johnson | 18 | Rotherham Mo | 1:03.62 |
| 4 | 86 | Kiera Noon | 23 | Co Bristol | 1:03.21 |
| 5 | 83 | Beth Hall | 18 | Mt Kelly | 1:03.27 |
| 6 | 77 | Emily Mears-Bentley | 19 | Co Leicester | 1:04.15 |
| 7 | 71 | Sadie Hunter | 15 | Co Peterboro | 1:06.39 |
| 8 | 65 | Chloe Cooke | 16 | Co Sheffield | 1:06.70 |
| 9 | 59 | Grace Jackson | 15 | Co Salford | 1:07.02 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 63 | Katie Blunt | 15 | N & D PP SC | 1:06.81 |
| 1 | 69 | Alicia Bethell | 15 | Wycombe Dist | 1:06.56 |
| 2 | 75 | Lucy Dring | 21 | Queensland | 1:04.94 |
| 3 | 81 | Georgia Pease | 21 | Swansea Uni | 1:03.61 |
| 4 | 87 | Amy West | 19 | Stockport Mo | 1:03.19 |
| 5 | 84 | Rebecca Amor | 20 | Co Manch Aq | 1:03.26 |
| 6 | 78 | Anna Stansfield | 20 | Leatherhead | 1:04.09 |
| 7 | 72 | Evie Young | 15 | Teddington | 1:06.38 |
| 8 | 66 | Olivia Minett | 15 | Co Peterboro | 1:06.65 |
| 9 | 60 | Olivia Beard | 15 | Nova Cent'n | 1:07.01 |