EVENT 305 Womens Open 50m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 2 | Hannah WILLIS | 14 | | Co Peterboro | 31.50 |
| 2 | 4 | Aoife MARLEY | 17 | | Witham Dolph | 31.48 |
| 3 | 6 | Larissa DEAN | 17 | | Harpenden | 31.46 |
| 4 | 8 | Leonie AMMANN | 13 | | Co Cambridge | 31.38 |
| 5 | 7 | Emily COOPER | 14 | | Basildon Ph | 31.40 |
| 6 | 5 | Almudena VISSER VELEZ | 17 | | Co Cambridge | 31.47 |
| 7 | 3 | Isabel MOORE | 16 | | Norwich Swan | 31.50 |
| 8 | 1 | Ellie CHALLIS | 15 | S3 | Clacton SC | 1:04.69 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 10 | Anouk ZECCHINI | 13 | | Co Cambridge | 31.31 |
| 2 | 12 | Madison GILMAN | 16 | | Norwich Swan | 31.30 |
| 3 | 14 | Georgina KNATCHBULL | 15 | | C Beds SS | 31.21 |
| 4 | 16 | Francesca PECCEI | 16 | | Watford SC | 31.20 |
| 5 | 15 | Bronte O'DEA | 16 | | Runnymede | 31.20 |
| 6 | 13 | Kaia PHILLIPS | 13 | | Bishop Stort | 31.27 |
| 7 | 11 | Katie ANDREWS | 15 | | Norwich Swan | 31.30 |
| 8 | 9 | Katherine DAYNES | 17 | | Halstead | 31.36 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 18 | Georgina MUNDAY | 15 | | Modernian | 31.20 |
| 2 | 20 | Cathryn THOMSON | 29 | | St Ives | 31.15 |
| 3 | 22 | Ciara MCAULEY | 14 | | Saffron Wald | 31.10 |
| 4 | 24 | Morgan ALLAN | 16 | | Modernian | 31.10 |
| 5 | 23 | Amelia HEARNE | 16 | | Clacton SC | 31.10 |
| 6 | 21 | Mia CARTER | 17 | | Bishop Stort | 31.15 |
| 7 | 19 | Daisy MOXHAM | 14 | | Co Cambridge | 31.19 |
| 8 | 17 | Grace WALLER | 15 | | Basildon Ph | 31.20 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 26 | Rhianne CARRICK | 15 | | Dunstable | 31.00 |
| 2 | 28 | Zoe MACDONALD | 16 | | Bor of Brox | 31.00 |
| 3 | 30 | Lillia THOMPSON | 16 | | Flitwick | 31.00 |
| 4 | 32 | Bethany SMITH | 16 | | Leighton Buz | 30.90 |
| 5 | 31 | Lily BEMMER | 16 | | Deben | 30.90 |
| 6 | 29 | Olivia SEAL | 17 | | Hatfield | 31.00 |
| 7 | 27 | Emma SHOOBERT | 17 | | C Beds SS | 31.00 |
| 8 | 25 | Gracie TROTTER | 16 | | C Beds SS | 31.10 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 34 | Freya HARWOOD | 15 | | Bor of Brox | 30.90 |
| 2 | 36 | Isabel WAINWRIGHT | 16 | | Modernian | 30.90 |
| 3 | 38 | Rebecca STROUD | 17 | | Brentwood | 30.80 |
| 4 | 40 | Chiara ROGERS | 16 | | Team Luton | 30.76 |
| 5 | 39 | Chloe BUTLER | 15 | | St Ives | 30.80 |
| 6 | 37 | Francesca BABER | 13 | | C Beds SS | 30.90 |
| 7 | 35 | Leah WIGHTMAN | 14 | | West Norfolk | 30.90 |
| 8 | 33 | Charlotte GILL | 14 | | Basildon Ph | 30.90 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 42 | Ella MURPHY | 17 | | Harpenden | 30.70 |
| 2 | 44 | Katie MALONEY | 22 | | Co Norwich | 30.70 |
| 3 | 46 | Matilda RANSOME | 13 | | Co Cambridge | 30.60 |
| 4 | 48 | Nancy NEAVE | 15 | | Braintree | 30.60 |
| 5 | 47 | Rebecca GIROLAMI | 16 | | Colchester | 30.60 |
| 6 | 45 | Anna FREEMAN | 14 | | St Ives | 30.69 |
| 7 | 43 | Lily MACDONALD | 14 | | Co Norwich | 30.70 |
| 8 | 41 | Jessica HEESOM | 16 | | Potters Bar | 30.72 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 50 | Eleanor LLEWELLYN | 19 | | West Suffolk | 30.57 |
| 2 | 52 | Cerys WILLIAMS | 15 | | West Suffolk | 30.50 |
| 3 | 54 | Grace GREENHALF | 12 | | Co Norwich | 30.50 |
| 4 | 56 | Ruby GREENHALF | 14 | | Co Norwich | 30.40 |
| 5 | 55 | Lael GROVES | 17 | | Co Cambridge | 30.44 |
| 6 | 53 | Bianka MISIKOVA | 16 | | Hatfield | 30.50 |
| 7 | 51 | Lucie PECK | 16 | | St Felix Sch | 30.50 |
| 8 | 49 | Keira WHARTON | 15 | | Berkhamsted | 30.60 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 58 | Lauren THOMAS | 17 | | Biggleswade | 30.40 |
| 2 | 60 | Niamh ADCOCK | 18 | | Co Norwich | 30.30 |
| 3 | 62 | Menna WALMSLEY | 15 | | Team Luton | 30.20 |
| 4 | 64 | Nellie EASTLAND | 17 | | Bishop Stort | 30.10 |
| 5 | 63 | Mia MASPERS | 17 | | teamipswich | 30.17 |
| 6 | 61 | Rebecca SMITH | 16 | | Norwich Swan | 30.26 |
| 7 | 59 | Freya WRIGHT | 17 | | West Suffolk | 30.30 |
| 8 | 57 | Grace GUNTON | 15 | | Co Norwich | 30.40 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 66 | Ruby WHEELER | 13 | | Basildon Ph | 30.10 |
| 2 | 68 | Lauren GRICE | 20 | | Leighton Buz | 30.00 |
| 3 | 70 | Angharad EVANS | 16 | | West Suffolk | 29.90 |
| 4 | 72 | Brooke JENKINS | 15 | | Basildon Ph | 29.90 |
| 5 | 71 | Kirsty FUGE | 13 | | Hatfield | 29.90 |
| 6 | 69 | Erin CROUCH | 15 | | teamipswich | 29.90 |
| 7 | 67 | Hannah SHARP | 17 | | Modernian | 30.07 |
| 8 | 65 | Sarah O'BRIEN | 23 | | West Norfolk | 30.10 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 74 | Tilly MAYES | 16 | | Thurrock | 29.80 |
| 2 | 76 | Millie DUDLEY | 15 | | Dunstable | 29.80 |
| 3 | 78 | Charlotte WALKER | 17 | | St Felix Sch | 29.70 |
| 4 | 80 | Ella HALE | 16 | | West Suffolk | 29.60 |
| 5 | 79 | Ciara GILL-RYAN | 17 | | Newmarket | 29.60 |
| 6 | 77 | Gracie KAY | 16 | | Co Cambridge | 29.80 |
| 7 | 75 | Celeste ANDREW | 18 | | Harlow Pen | 29.80 |
| 8 | 73 | Harriet CLEMENTS | 15 | | Watford SC | 29.80 |
| Heat Number - 11 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 82 | Alison BINNS | 23 | | Bushey | 29.60 |
| 2 | 84 | Olivia NEWMAN-BARONIUS | 13 | | Putteridge | 29.50 |
| 3 | 86 | Nonhlanhla THOLE | 14 | | St Felix Sch | 29.40 |
| 4 | 88 | Lauren STOTT | 17 | | Hatfield | 29.40 |
| 5 | 87 | Eve WRIGHT | 16 | | Co Peterboro | 29.40 |
| 6 | 85 | Erin O'MEARA | 16 | | Co St Albans | 29.50 |
| 7 | 83 | Rebecca WATT | 17 | | DunmowAtlant | 29.50 |
| 8 | 81 | Lara-Grace MOUNT | 17 | | West Norfolk | 29.60 |
| Heat Number - 12 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 92 | Rebecca BURTON | 21 | | Co Peterboro | 29.12 |
| 2 | 98 | Charlotte WHITE | 14 | | West Suffolk | 28.90 |
| 3 | 104 | Isabella CHAPMAN | 15 | | Harpenden | 28.70 |
| 4 | 110 | May BRADBURN | 15 | | Chelmsford | 27.60 |
| 5 | 107 | Jessica WOODWARD | 16 | | Hatfield | 27.90 |
| 6 | 101 | Ciara TAYLOR | 14 | | St Ives | 28.80 |
| 7 | 95 | Asma PARKER | 16 | | Colchester | 29.00 |
| 8 | 89 | Ciara WOOKEY | 15 | | Colchester | 29.30 |
| Heat Number - 13 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 93 | Jessica SHAW | 14 | | Co Peterboro | 29.10 |
| 2 | 99 | Matilda BOGLE | 13 | | teamipswich | 28.90 |
| 3 | 105 | Molly OLLINGTON | 21 | | Co Cambridge | 28.50 |
| 4 | 111 | Sacha THOMAS | 16 | | Co Norwich | 27.30 |
| 5 | 108 | Sara KALAWSKA | 16 | | Hatfield | 27.84 |
| 6 | 102 | Lily MERRETT | 16 | | Co St Albans | 28.72 |
| 7 | 96 | Martine TRAN | 18 | | Thurrock | 29.00 |
| 8 | 90 | Tia GARDINER | 17 | | Chelmsford | 29.30 |
| Heat Number - 14 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 94 | Iona TRAINER | 16 | | Co Peterboro | 29.10 |
| 2 | 100 | Valeria GIRON | 14 | | Hatfield | 28.80 |
| 3 | 106 | Natalie SANFORD | 15 | | St Felix Sch | 28.00 |
| 4 | 112 | Georgina PRYOR | 21 | | Harlow Pen | 27.10 |
| 5 | 109 | Rikke NAGELL-KLEVEN | 24 | | Co Norwich | 27.70 |
| 6 | 103 | Georgia PEASE | 17 | | Basildon Ph | 28.70 |
| 7 | 97 | Lauren NELSON | 18 | | Harlow Pen | 29.00 |
| 8 | 91 | Arabella WARD | 13 | | Modernian | 29.30 |