EVENT 507 Womens Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 2 | Rebecca SMITH | 16 | | Norwich Swan | 1:08.96 |
| 2 | 4 | Jessica HEESOM | 16 | | Potters Bar | 1:08.69 |
| 3 | 6 | Katie MALONEY | 22 | | Co Norwich | 1:08.50 |
| 4 | 8 | Francesca BABER | 13 | | C Beds SS | 1:08.40 |
| 5 | 7 | Freya HARWOOD | 15 | | Bor of Brox | 1:08.48 |
| 6 | 5 | Grace GREENHALF | 12 | | Co Norwich | 1:08.60 |
| 7 | 3 | Kiera BLUNDEN | 14 | | Chelmsford | 1:08.82 |
| 8 | 1 | Larissa DEAN | 17 | | Harpenden | 1:08.98 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 10 | Leah WIGHTMAN | 14 | | West Norfolk | 1:08.11 |
| 2 | 12 | Brooke JENKINS | 15 | | Basildon Ph | 1:07.90 |
| 3 | 14 | Emily GREEN | 18 | | Brentwood | 1:07.70 |
| 4 | 16 | Iona TRAINER | 16 | | Co Peterboro | 1:07.60 |
| 5 | 15 | Arabella WARD | 13 | | Modernian | 1:07.70 |
| 6 | 13 | Hannah SHARP | 17 | | Modernian | 1:07.90 |
| 7 | 11 | Erin CROUCH | 15 | | teamipswich | 1:08.00 |
| 8 | 9 | Lily MACDONALD | 14 | | Co Norwich | 1:08.30 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 18 | Jessica PENKUL | 17 | | Bishop Stort | 1:07.48 |
| 2 | 20 | Gracie TROTTER | 16 | | C Beds SS | 1:07.45 |
| 3 | 22 | Niamh ADCOCK | 18 | | Co Norwich | 1:07.40 |
| 4 | 24 | Menna WALMSLEY | 15 | | Team Luton | 1:07.00 |
| 5 | 23 | Nellie EASTLAND | 17 | | Bishop Stort | 1:07.27 |
| 6 | 21 | Lauren THOMAS | 17 | | Biggleswade | 1:07.41 |
| 7 | 19 | Eleanor LLEWELLYN | 19 | | West Suffolk | 1:07.48 |
| 8 | 17 | Almudena VISSER VELEZ | 17 | | Co Cambridge | 1:07.59 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 26 | Matilda BOGLE | 13 | | teamipswich | 1:06.90 |
| 2 | 28 | Asma PARKER | 16 | | Colchester | 1:06.80 |
| 3 | 30 | Olivia NORMAN | 17 | | teamipswich | 1:06.66 |
| 4 | 32 | Nonhlanhla THOLE | 14 | | St Felix Sch | 1:06.34 |
| 5 | 31 | Lucie PECK | 16 | | St Felix Sch | 1:06.50 |
| 6 | 29 | Ciara GILL-RYAN | 17 | | Newmarket | 1:06.68 |
| 7 | 27 | Ciara TAYLOR | 14 | | St Ives | 1:06.90 |
| 8 | 25 | Cerys WILLIAMS | 15 | | West Suffolk | 1:06.99 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 36 | Tia GARDINER | 17 | | Chelmsford | 1:06.10 |
| 2 | 42 | Bianka MISIKOVA | 16 | | Hatfield | 1:05.60 |
| 3 | 48 | Georgia PEASE | 17 | | Basildon Ph | 1:04.50 |
| 4 | 54 | Sacha THOMAS | 16 | | Co Norwich | 1:01.30 |
| 5 | 51 | Jessica WOODWARD | 16 | | Hatfield | 1:03.20 |
| 6 | 45 | Ciara WOOKEY | 15 | | Colchester | 1:04.80 |
| 7 | 39 | Ella HALE | 16 | | West Suffolk | 1:05.80 |
| 8 | 33 | Lauren GRICE | 20 | | Leighton Buz | 1:06.30 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 37 | Olivia NEWMAN-BARONIUS | 13 | | Putteridge | 1:06.10 |
| 2 | 43 | Ellie O'KEEFFE | 19 | | Co Cambridge | 1:04.94 |
| 3 | 49 | Valeria GIRON | 14 | | Hatfield | 1:04.10 |
| 4 | 55 | Sara KALAWSKA | 16 | | Hatfield | 1:00.30 |
| 5 | 52 | May BRADBURN | 15 | | Chelmsford | 1:02.80 |
| 6 | 46 | Lauren STOTT | 17 | | Hatfield | 1:04.80 |
| 7 | 40 | Matilda RANSOME | 13 | | Co Cambridge | 1:05.70 |
| 8 | 34 | Lauren NELSON | 18 | | Harlow Pen | 1:06.20 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 38 | Louise FIDDES | 18 | S14 | Hatfield | 1:05.90 |
| 2 | 44 | Rikke NAGELL-KLEVEN | 24 | | Co Norwich | 1:04.90 |
| 3 | 50 | Rebecca BURTON | 21 | | Co Peterboro | 1:03.94 |
| 4 | 56 | Georgina PRYOR | 21 | | Harlow Pen | 1:00.00 |
| 5 | 53 | Natalie SANFORD | 15 | | St Felix Sch | 1:01.80 |
| 6 | 47 | Charlotte WHITE | 14 | | West Suffolk | 1:04.50 |
| 7 | 41 | Molly OLLINGTON | 21 | | Co Cambridge | 1:05.70 |
| 8 | 35 | Jessica SHAW | 14 | | Co Peterboro | 1:06.14 |