EVENT 108 Female 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 3 | 1 | Scarlett KENNEDY | 12 | Guildford Ct | 1:35.87 |
| 4 | 3 | Holly RALPH | 11 | Chesterfield | 1:31.02 |
| 5 | 2 | Maisie WILKES | 10 | Chesterfield | 1:32.60 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 4 | Autum CLAXTON | 11 | Stockport Mo | 1:28.90 |
| 2 | 6 | Megan ORMISTON | 10 | Stockport Mo | 1:28.13 |
| 3 | 8 | Sophia LICHFIELD | 08 | Chesterfield | 1:27.58 |
| 4 | 10 | Ruby GREEN | 09 | Chesterfield | 1:26.30 |
| 5 | 9 | Sophia YU | 09 | Stockport Mo | 1:27.28 |
| 6 | 7 | Ellie RANDALL | 08 | Chesterfield | 1:27.83 |
| 7 | 5 | Lily-Grace BELFIELD | 10 | Chesterfield | 1:28.36 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 12 | Lara CHALLINOR | 10 | Stockport Mo | 1:25.31 |
| 2 | 14 | Lucy SNAITH | 08 | Loughborough | 1:24.39 |
| 3 | 16 | Matilda HENDON | 10 | Tadcaster | 1:21.70 |
| 4 | 18 | Eva WEBB | 09 | Stockport Mo | 1:20.12 |
| 5 | 17 | Ruby WETHERILL | 08 | NottmLeander | 1:20.81 |
| 6 | 15 | Emily SHRIMPTON | 05 | Tadcaster | 1:23.86 |
| 7 | 13 | Connie PALMER | 07 | Repton | 1:24.85 |
| 8 | 11 | Megan NEAVE | 03 | Repton | 1:25.60 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 22 | Sophie BAKER | 04 | Co Sheffield | 1:16.60 |
| 2 | 28 | Morgan BRAND | 06 | Rugby | 1:11.80 |
| 3 | 34 | Carys O'REILLY | 03 | Co Sheffield | 1:09.28 |
| 4 | 40 | Leah SCHLOSSHAN | 05 | Co Leeds | 1:06.40 |
| 5 | 37 | Mabli COLLYER | 08 | Repton | 1:08.10 |
| 6 | 31 | Paige FENTON | 03 | Loughboro Un | 1:10.10 |
| 7 | 25 | Mabel WALKER | 07 | Repton | 1:13.81 |
| 8 | 19 | Siena OXBY | 07 | Stockport Mo | 1:17.62 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 23 | Honey Rose GROCOCK | 09 | Co Sheffield | 1:14.80 |
| 2 | 29 | Colleen DEVLIN | 04 | Stockport Mo | 1:10.92 |
| 3 | 35 | Charlotte BIANCHI | 06 | Co Sheffield | 1:09.10 |
| 4 | 41 | Sienna ROBINSON | 05 | Lboro Uni | 1:06.35 |
| 5 | 38 | Lily BOOKER | 01 | Loughboro Un | 1:07.90 |
| 6 | 32 | Caitlin HARTLEY | 04 | Bath Univ | 1:09.40 |
| 7 | 26 | Holly ROBINSON | 05 | Repton | 1:12.40 |
| 8 | 20 | Kaitlyn BUTTERS | 08 | Retford | 1:17.38 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 24 | Amelia DENHAM | 09 | Chesterfield | 1:14.49 |
| 2 | 30 | Abigail MILES | 04 | Co Sheffield | 1:10.40 |
| 3 | 36 | Jana SPINNER | 99 | Bath Univ | 1:08.49 |
| 4 | 42 | Tatiana BELONOGOFF | 01 | Lboro Uni | 1:04.41 |
| 5 | 39 | Niamh COYNE | 01 | NC Dublin | 1:06.87 |
| 6 | 33 | Emily MORGAN-HUGHES | 04 | Bath Univ | 1:09.40 |
| 7 | 27 | Annabel COOKE | 09 | Co Sheffield | 1:12.00 |
| 8 | 21 | Poppy MATHIAS | 06 | Repton | 1:17.03 |