EVENT 413 Female 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 3 | 2 | Florence Richbell | 12 | S12 | Flitwick | |
| 4 | 4 | Isabella Helliwell | 15 | | Basildon Ph | |
| 5 | 3 | Sara Kelly | 15 | | Colchester | 1:13.05 |
| 6 | 1 | Ida Corcoran | 17 | S9 | Flitwick | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 6 | Ruby Baxter | 15 | | West Norfolk | |
| 2 | 8 | Amber Lyne | 16 | | Co Cambridge | |
| 3 | 10 | Senudi Ratnayake | 15 | | Norwich Swan | 1:12.05 |
| 4 | 12 | Imogen Bygrave | 16 | | Co Cambridge | |
| 5 | 11 | Lois Fields | 15 | | Bishop Stort | |
| 6 | 9 | Poppy Garrod | 17 | | Co Peterboro | |
| 7 | 7 | Eden Meanti | 15 | | Putteridge | |
| 8 | 5 | Belle Ringwood | 16 | | West Norfolk | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 14 | Charlotte Belcher | 16 | | Bedford SS | |
| 2 | 16 | Dayna Arbon | 20 | | Co Norwich | |
| 3 | 18 | Alexandra Hurley | 16 | | Co Cambridge | 1:12.37 |
| 4 | 20 | Alice Robinson | 17 | | Co Cambridge | 1:10.79 |
| 5 | 19 | Jessica Pugh | 16 | | Norwich Swan | |
| 6 | 17 | Ava Sims | 15 | | Chelmsford | 1:12.07 |
| 7 | 15 | Anudi Ratnayake | 15 | | Norwich Swan | 1:13.33 |
| 8 | 13 | Isabelle King | 16 | | Bishop Stort | 1:12.47 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 22 | Matilda Stokes | 15 | | Co Peterboro | 1:13.50 |
| 2 | 24 | Anna Zapisetskaya | 15 | | Co St Albans | 1:11.69 |
| 3 | 26 | Rebecca Olaru | 15 | | Chelmsford | 1:10.31 |
| 4 | 28 | Talia Williams | 19 | | Tring | |
| 5 | 27 | Lola Mitchinson | 15 | | Thetford | 1:10.42 |
| 6 | 25 | Charlie Duce | 17 | | Bedford SS | 1:10.13 |
| 7 | 23 | Amber Flitton | 17 | | Dunstable | |
| 8 | 21 | Lexie Sandiford | 15 | | Putteridge | 1:07.37 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 30 | Anastasja Wall | 16 | | Co Norwich | 1:09.40 |
| 2 | 32 | Heidi King | 15 | | Hemel Hemp | |
| 3 | 34 | Kenzie Bradshaw | 16 | | Hertford | 1:09.99 |
| 4 | 36 | Abigail Davis | 16 | | Bedford SS | |
| 5 | 35 | Gabriella Meyer | 17 | | Witham Dolph | 1:10.69 |
| 6 | 33 | Amerie Njawaya | 16 | | Putteridge | 1:08.40 |
| 7 | 31 | Summer Boswell | 18 | | Hatfield | |
| 8 | 29 | Orlagh Quarrell | 16 | | Watford SC | |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 40 | Meghan Howarth Owen | 17 | | Chelmsford | 1:09.43 |
| 2 | 46 | Emily-Grace Bentley | 16 | | Basildon Ph | 1:07.95 |
| 3 | 52 | Lois Smith | 16 | | Basildon Ph | 1:07.73 |
| 4 | 58 | Erin Barber | 16 | | Norwich Swan | 1:06.04 |
| 5 | 55 | Nicole Maynard | 17 | | Basildon Ph | 1:07.03 |
| 6 | 49 | Erin Currie | 18 | | Hatfield | 1:08.80 |
| 7 | 43 | Mia Nelson | 15 | | Cheshunt | 1:09.78 |
| 8 | 37 | Freya Hadnutt | 18 | | Bishop Stort | 1:09.63 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 41 | Lily Steel | 16 | | teamipswich | 1:08.66 |
| 2 | 47 | Amy Meyer | 17 | | Biggleswade | 1:07.50 |
| 3 | 53 | Chloe Armstrong | 19 | | teamipswich | 1:06.28 |
| 4 | 59 | Isobel Mather | 19 | | Co Cambridge | 1:08.06 |
| 5 | 56 | Emily Pitcher | 18 | | Norwich Swan | 1:07.66 |
| 6 | 50 | Grace Robinson | 17 | | Norwich Swan | 1:06.94 |
| 7 | 44 | E Barth-Wehrenalp | 16 | | Chelmsford | 1:08.60 |
| 8 | 38 | Sophie Roberts | 17 | | teamipswich | |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 42 | Olivia Mendham | 18 | | DunmowAtlant | |
| 2 | 48 | Naomi Rose Conday | 16 | | Bishop Stort | 1:08.92 |
| 3 | 54 | Tia Sammut | 15 | | Bedford SS | |
| 4 | 60 | Sophie Moore | 21 | | Co Cambridge | |
| 5 | 57 | Emma Cushion | 16 | | Co Peterboro | 1:07.08 |
| 6 | 51 | Lauren Stott | 24 | | Co St Albans | |
| 7 | 45 | Megan Pye | 24 | | Co Norwich | |
| 8 | 39 | Erin Woodrow | 19 | | West Norfolk | |