EVENT 203 Womens Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Matilda Bogle | 13 | teamipswich | 1:08.51 |
| 1 | 4 | Ava Lambropoulos | 12 | Camden Swiss | 1:08.45 |
| 2 | 6 | Matilda Ransome | 13 | Co Cambridge | 1:08.22 |
| 3 | 8 | Rachael Banks | 13 | Stockport Mo | 1:08.18 |
| 4 | 10 | Eve Pendlebury | 13 | Co Salford | 1:08.03 |
| 5 | 9 | Nonhlanhla Thole | 14 | St Felix Sch | 1:08.06 |
| 6 | 7 | Jessica Pennifold | 13 | Southport | 1:08.18 |
| 7 | 5 | Anna Uren | 13 | Co Bristol | 1:08.31 |
| 8 | 3 | Brooke Illingworth | 13 | Ellesmere Co | 1:08.49 |
| 9 | 1 | Ella Thornburg | 13 | Littleh'pton | 1:08.56 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Iona Colbert | 14 | Nova Cent'n | 1:07.94 |
| 1 | 14 | Lottie Jackson | 14 | Guildford Ct | 1:07.87 |
| 2 | 16 | Leah Burgin-Rawson | 14 | Derventio | 1:07.77 |
| 3 | 18 | Jessica Owen | 14 | Co Leicester | 1:07.73 |
| 4 | 20 | Olivia Sheehan | 14 | Wigan BEST | 1:07.59 |
| 5 | 19 | Lauren Smith | 13 | Co Leeds | 1:07.65 |
| 6 | 17 | Despoina Giannakaki | 12 | Co Milton K | 1:07.77 |
| 7 | 15 | Chloe Burkill | 14 | Sutton Cheam | 1:07.87 |
| 8 | 13 | Daisy Dewsbury | 14 | Bracknell | 1:07.91 |
| 9 | 11 | Isabella Moore | 14 | Street | 1:07.95 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 22 | Jess Prokas | 14 | Cockermouth | 1:07.50 |
| 1 | 24 | Josephine Klein | 14 | Exeter City | 1:07.39 |
| 2 | 26 | Cara McVeigh | 14 | Tavistock | 1:07.35 |
| 3 | 28 | Millie Duncan | 13 | Stockport Mo | 1:07.25 |
| 4 | 30 | Beth Hall | 14 | Grimsby AST | 1:07.21 |
| 5 | 29 | Olivia Newman-Baronius | 13 | Putteridge | 1:07.24 |
| 6 | 27 | Naomi Parker | 13 | Gates &Whick | 1:07.25 |
| 7 | 25 | Hannah Brooke | 14 | Co St Albans | 1:07.35 |
| 8 | 23 | Ruby Wheeler | 13 | Basildon Ph | 1:07.47 |
| 9 | 21 | Ashleigh Baillie | 13 | Co Sheffield | 1:07.53 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 32 | Isla Jones | 12 | Co Sheffield | 1:07.18 |
| 1 | 34 | Gabriella Barry | 14 | Pershore | 1:07.08 |
| 2 | 36 | Kennedy Gordon | 14 | Guildford Ct | 1:07.01 |
| 3 | 38 | Emily Brook | 15 | Bo Kirklees | 1:06.89 |
| 4 | 40 | Halle Broughton | 15 | Thanet Swim | 1:06.85 |
| 5 | 39 | Alice Weston | 13 | Wycombe Dist | 1:06.88 |
| 6 | 37 | Alicia Corver | 15 | Bromley | 1:06.97 |
| 7 | 35 | Kate Morris | 14 | Nova Cent'n | 1:07.05 |
| 8 | 33 | Gemma Dilks | 14 | Tiverton | 1:07.10 |
| 9 | 31 | Erika Pasakinskaite | 13 | Bark & Dagen | 1:07.18 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 42 | Chloe Harris | 14 | Royal Wolv | 1:06.79 |
| 1 | 44 | Isabel Kay | 15 | Winsford | 1:06.64 |
| 2 | 46 | Skye McLaughlin | 15 | TauntonDeane | 1:06.55 |
| 3 | 48 | Anna O'Brien | 15 | Newcastle | 1:06.40 |
| 4 | 50 | Rebecca Amor | 16 | Copeland | 1:06.32 |
| 5 | 49 | Lottie Roberts | 12 | Guildford Ct | 1:06.40 |
| 6 | 47 | Martha Bradley | 15 | Co Leeds | 1:06.45 |
| 7 | 45 | Ciara Wookey | 15 | Colchester | 1:06.62 |
| 8 | 43 | Emily Mears-Bentley | 15 | Co Leicester | 1:06.68 |
| 9 | 41 | Hermione Roe | 14 | Stockport Mo | 1:06.83 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 52 | Faye Francis | 16 | Portsmouth N | 1:06.31 |
| 1 | 54 | Amelia Robertson | 15 | Newcastle | 1:06.20 |
| 2 | 56 | Beatrice Clover | 15 | Stockport Mo | 1:06.16 |
| 3 | 58 | Annabel Wilson | 15 | Beckenham | 1:06.15 |
| 4 | 60 | Olivia Hunter | 15 | Teddington | 1:06.05 |
| 5 | 59 | Ayanna Fulga | 15 | Co Oxford | 1:06.11 |
| 6 | 57 | Libby Dunford | 16 | Hoddesdon | 1:06.15 |
| 7 | 55 | Sassy Palfreman | 16 | Co Leeds | 1:06.18 |
| 8 | 53 | Lydia Parker | 15 | Fareham N'ds | 1:06.30 |
| 9 | 51 | Ella Poole | 16 | Northampton | 1:06.31 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 64 | Millie Checkley | 15 | Co Birm'ham | 1:05.94 |
| 1 | 70 | Eve Leleux | 16 | Wrekin Coll | 1:05.53 |
| 2 | 76 | Abigail Stemp | 16 | Woking | 1:05.34 |
| 3 | 82 | Amy Corcoran | 17 | KingstonHull | 1:04.84 |
| 4 | 88 | Georgina Tallon | 19 | Potters Bar | 1:04.01 |
| 5 | 85 | Abigail Lacey | 17 | Portsmouth N | 1:04.71 |
| 6 | 79 | Gemma Elliott | 17 | Havant & Wat | 1:05.00 |
| 7 | 73 | Kimberley Burston | 16 | Oldham Aqua | 1:05.45 |
| 8 | 67 | Abigail Poulton | 16 | Bromley | 1:05.77 |
| 9 | 61 | Meadow Dronsfield | 15 | Co Manch Aq | 1:05.96 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 65 | Lily Merrett | 16 | Co St Albans | 1:05.93 |
| 1 | 71 | Freya Rothery | 15 | Toronto CAN | 1:05.52 |
| 2 | 77 | Lauren Braddon | 18 | Maidstone | 1:05.03 |
| 3 | 83 | Jessica Podger | 18 | Millfield | 1:04.82 |
| 4 | 89 | Abigail Burr | 21 | Lincoln Vulc | 1:03.85 |
| 5 | 86 | Imogen Meers | 17 | Bromley | 1:04.58 |
| 6 | 80 | Jessica Cross | 18 | Rushmoor Ryl | 1:04.96 |
| 7 | 74 | Chloe Hirst | 16 | Bo Kirklees | 1:05.44 |
| 8 | 68 | Paige Coombs | 16 | Guildford Ct | 1:05.68 |
| 9 | 62 | Charlotte Moores | 16 | Guildford Ct | 1:05.95 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 66 | Delphine Little | 16 | Co Oxford | 1:05.82 |
| 1 | 72 | Juliette Lawrence | 16 | Epsom Dist | 1:05.49 |
| 2 | 78 | Holly White | 17 | Co Liverpool | 1:05.03 |
| 3 | 84 | Megan Dean | 17 | Wolv'hampton | 1:04.73 |
| 4 | 90 | Rebecca Twardochleb | 20 | Newcastle St | 1:03.82 |
| 5 | 87 | Milly Scotchbrook | 19 | Co Leicester | 1:04.31 |
| 6 | 81 | Hollie Steer | 17 | Dartmoor DA | 1:04.85 |
| 7 | 75 | Jessica Woodward | 16 | Hatfield | 1:05.38 |
| 8 | 69 | Daisy Lovegrove | 16 | Reading | 1:05.64 |
| 9 | 63 | Ella Bainbridge | 15 | Donc Dartes | 1:05.95 |