EVENT 602 Womens Open 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 2 | Maeve POOLEY | 14 | West Suffolk | 1:09.50 |
| 3 | 4 | Amelia HEARNE | 16 | Clacton SC | 1:09.46 |
| 4 | 6 | Ciara GILL-RYAN | 17 | Newmarket | 1:09.40 |
| 5 | 5 | Brooke JENKINS | 15 | Basildon Ph | 1:09.43 |
| 6 | 3 | Francesca LOW | 14 | Chelmsford | 1:09.48 |
| 7 | 1 | Georgina MUNDAY | 15 | Modernian | 1:09.50 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 8 | Mia FURSEDONNE | 17 | Basildon Ph | 1:09.38 |
| 2 | 10 | Charlotte HARRIS | 16 | Maldon Shark | 1:09.30 |
| 3 | 12 | Maisie PARKIN | 17 | Verulam | 1:09.18 |
| 4 | 14 | Larissa DEAN | 17 | Harpenden | 1:09.15 |
| 5 | 13 | Celeste ANDREW | 18 | Harlow Pen | 1:09.15 |
| 6 | 11 | Gemma NOTTAGE | 14 | Watford SC | 1:09.27 |
| 7 | 9 | Ella TOLLIDAY | 17 | St Felix Sch | 1:09.37 |
| 8 | 7 | Hannah WILLIS | 14 | Co Peterboro | 1:09.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 16 | Emily COOPER | 14 | Basildon Ph | 1:09.10 |
| 2 | 18 | Agnes BURNS | 18 | Harpenden | 1:08.92 |
| 3 | 20 | Jessica SHAW | 14 | Co Peterboro | 1:08.71 |
| 4 | 22 | Ellie MATTHEWS | 16 | Putteridge | 1:08.31 |
| 5 | 21 | Emma HOWITT | 17 | Modernian | 1:08.40 |
| 6 | 19 | Lucie PECK | 16 | St Felix Sch | 1:08.86 |
| 7 | 17 | Isabel WAINWRIGHT | 16 | Modernian | 1:09.06 |
| 8 | 15 | Daisy MOXHAM | 14 | Co Cambridge | 1:09.10 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 24 | Clara WATSON-FLOWERS | 13 | St Felix Sch | 1:08.29 |
| 2 | 26 | Jemima WAYMAN | 16 | Deben | 1:08.14 |
| 3 | 28 | Tia GARDINER | 17 | Chelmsford | 1:08.09 |
| 4 | 30 | Rebecca WEST | 17 | Thurrock | 1:07.98 |
| 5 | 29 | Emma SHOOBERT | 17 | C Beds SS | 1:08.00 |
| 6 | 27 | Lauren SHARP | 16 | Chelmsford | 1:08.10 |
| 7 | 25 | Olivia LEE | 15 | Co Peterboro | 1:08.20 |
| 8 | 23 | Matilda TURNER | 16 | Bor of Brox | 1:08.31 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 32 | Molly REDGRAVE | 15 | Colchester | 1:07.95 |
| 2 | 34 | Katie ANDREWS | 15 | Norwich Swan | 1:07.70 |
| 3 | 36 | Leah WIGHTMAN | 14 | West Norfolk | 1:07.32 |
| 4 | 38 | Emily LUSH | 17 | Potters Bar | 1:06.98 |
| 5 | 37 | Matilda BOGLE | 13 | teamipswich | 1:07.20 |
| 6 | 35 | Kaia PHILLIPS | 13 | Bishop Stort | 1:07.67 |
| 7 | 33 | Isabella YEABSLEY | 13 | Hatfield | 1:07.77 |
| 8 | 31 | Jessica KEFFORD | 15 | Dunstable | 1:07.98 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 42 | Erin YEOMANSON | 16 | teamipswich | 1:06.49 |
| 2 | 48 | Ella TURNER | 14 | Basildon Ph | 1:06.00 |
| 3 | 54 | Gracie KAY | 16 | Co Cambridge | 1:04.71 |
| 4 | 60 | Lija RADZIUNAITE | 17 | teamipswich | 1:03.11 |
| 5 | 57 | Niamh JAMES | 18 | Bishop Stort | 1:04.50 |
| 6 | 51 | Anna KIRK | 20 | Co Cambridge | 1:05.43 |
| 7 | 45 | Sophie LANDER | 14 | Deben | 1:06.25 |
| 8 | 39 | Kiera BLUNDEN | 14 | Chelmsford | 1:06.81 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 43 | Lara-Grace MOUNT | 17 | West Norfolk | 1:06.41 |
| 2 | 49 | Carys BREALEY | 15 | Harlow Pen | 1:05.79 |
| 3 | 55 | Lauren STOTT | 17 | Hatfield | 1:04.64 |
| 4 | 61 | Megan PYE | 17 | Co Norwich | 1:02.93 |
| 5 | 58 | Georgina PRYOR | 21 | Harlow Pen | 1:03.53 |
| 6 | 52 | Charlotte NORMAN | 14 | teamipswich | 1:05.10 |
| 7 | 46 | Bronte O'DEA | 16 | Runnymede | 1:06.21 |
| 8 | 40 | Georgia PEASE | 17 | Basildon Ph | 1:06.72 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 44 | Grace WALLER | 15 | Basildon Ph | 1:06.40 |
| 2 | 50 | Olivia NORMAN | 17 | teamipswich | 1:05.70 |
| 3 | 56 | Asma PARKER | 16 | Colchester | 1:04.56 |
| 4 | 62 | Emma CRUICKSHANKS | 16 | teamipswich | 1:02.65 |
| 5 | 59 | Eve WRIGHT | 16 | Co Peterboro | 1:03.50 |
| 6 | 53 | Faye NUGENT | 23 | Bor of Brox | 1:05.06 |
| 7 | 47 | Jessica KEOGH | 15 | Hatfield | 1:06.15 |
| 8 | 41 | Harriet CLEMENTS | 15 | Watford SC | 1:06.54 |