EVENT 407 Girls Open 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 2 | Lucia DUNHILL | 11 | Co Leeds | 1:29.07 |
| 4 | 4 | Poppy DUNNE | 11 | Skipton | 1:25.30 |
| 5 | 3 | Lucy OLIVER | 10 | Darlington | 1:26.21 |
| 6 | 1 | Amelia REDFEARN | 11 | Skipton | 1:29.30 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 6 | Libby MORRISON | 12 | York City | 1:23.90 |
| 1 | 8 | Keira HINCHLIFFE | 12 | Co Bradford | 1:22.22 |
| 2 | 10 | Mae JOHNSTONE | 12 | Co Leeds | 1:21.40 |
| 3 | 12 | Charlotte SHAW | 11 | Co Leeds | 1:20.18 |
| 4 | 14 | Ella CALVERLEY | 12 | Donc Dartes | 1:17.17 |
| 5 | 13 | Chloe AGAR | 13 | Co Leeds | 1:19.33 |
| 6 | 11 | Megan PENDLETON | 13 | Wirral Metro | 1:20.20 |
| 7 | 9 | Fennella TURNER | 12 | Skipton | 1:21.40 |
| 8 | 7 | Beatrice ROBERTS | 12 | York City | 1:23.47 |
| 9 | 5 | Molly HARWOOD | 13 | Wirral Metro | 1:25.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 16 | Grace MOORLEY | 14 | Leic Sharks | 1:16.40 |
| 1 | 18 | Nia THORMAN | 13 | Rotherham Mo | 1:15.90 |
| 2 | 20 | Sophie HOTCHKISS | 14 | Co Derby | 1:15.50 |
| 3 | 22 | Isabelle ASPINALL | 14 | Co Birm'ham | 1:14.30 |
| 4 | 24 | Lily-Mae PRATT | 13 | Skipton | 1:14.10 |
| 5 | 23 | Amy PICKARD | 14 | Co Leeds | 1:14.30 |
| 6 | 21 | Ruby GURUNG | 13 | Co Birm'ham | 1:14.70 |
| 7 | 19 | Maeve CARROLL | 12 | Co Leeds | 1:15.80 |
| 8 | 17 | Sedona REED | 12 | Co Leeds | 1:15.90 |
| 9 | 15 | Ruby DIMENT | 12 | Darlington | 1:16.70 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 28 | Philippa BROMLEY | 13 | Co Leeds | 1:12.10 |
| 1 | 34 | Millie GIDMAN | 15 | Wirral Metro | 1:10.50 |
| 2 | 40 | Molly COLBERT | 18 | Nova Cent'n | 1:08.50 |
| 3 | 46 | Imogen VOLLANS | 16 | Harrogate | 1:07.60 |
| 4 | 52 | Lily MASSEY | 16 | Co Birm'ham | 1:06.30 |
| 5 | 49 | Sophie HART | 18 | Lincoln Vulc | 1:07.20 |
| 6 | 43 | Lucy HITCHIN | 14 | Co Leicester | 1:07.80 |
| 7 | 37 | Simone ELLSON | 17 | Pioneer 79 | 1:09.20 |
| 8 | 31 | Charlotte DENIZ | 14 | York City | 1:11.54 |
| 9 | 25 | Thea STEWART | 13 | Harrogate | 1:13.80 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 29 | Anna ASHCROFT | 12 | Co Leeds | 1:11.98 |
| 1 | 35 | Maisie AUBREY | 17 | Lincoln Vulc | 1:10.10 |
| 2 | 41 | Madison TURNER | 15 | Skipton | 1:08.20 |
| 3 | 47 | Jessica LI | 14 | NottmLeander | 1:07.60 |
| 4 | 53 | Emma ERSKINE | 15 | Nova Cent'n | 1:05.60 |
| 5 | 50 | Evie RICHARDS | 16 | Co Leicester | 1:07.00 |
| 6 | 44 | Georgia ASHTON | 15 | Bolton Metro | 1:07.60 |
| 7 | 38 | Sophia BASARABA | 14 | Skipton | 1:08.90 |
| 8 | 32 | Laura GRAY | 16 | Loftus Dol | 1:11.10 |
| 9 | 26 | Lisa BARZAGHI | 12 | Bolton Metro | 1:13.57 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 30 | Jessica REILLY | 13 | Harrogate | 1:11.80 |
| 1 | 36 | Alice TOON | 14 | Co Birm'ham | 1:09.40 |
| 2 | 42 | Charlotte GUDGEON | 18 | Leic Sharks | 1:08.00 |
| 3 | 48 | Bethany JORDAN | 18 | Co Wakefield | 1:07.30 |
| 4 | 54 | Courteney PRICE | 21 | Nova Cent'n | 1:01.70 |
| 5 | 51 | Gracie COMYN | 14 | Co Birm'ham | 1:06.90 |
| 6 | 45 | Natasha TYE | 16 | Co Salford | 1:07.60 |
| 7 | 39 | Sarah HOLMES | 14 | Nova Cent'n | 1:08.88 |
| 8 | 33 | Lucy RUSSELL | 15 | Co Leicester | 1:10.80 |
| 9 | 27 | Holly MACDONALD | 13 | Co Leeds | 1:12.59 |