| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Riley WEBER | 11 | Corby | 3:41.00 |
| 4 | 3 | Georgina BEEBY | 14 | Kettering | 3:15.70 |
| 5 | 2 | Bella GIPSON | 12 | Corby | 3:40.01 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Emmie DENIGAN | 11 | Melton M'bry | 3:05.60 |
| 2 | 7 | Isabelle PAWLOWSKI | 13 | Corby | 2:58.40 |
| 3 | 9 | Georgia PARKER | 14 | Corby | 2:51.70 |
| 4 | 11 | Alice STREETER | 19 | Market Har | 2:36.90 |
| 5 | 10 | Elisa GIRAUD | 13 | Corby | 2:41.30 |
| 6 | 8 | Poppy BLOWFIELD | 15 | Corby | 2:52.66 |
| 7 | 6 | Elsbeth WILLIAMS | 13 | Market Har | 3:04.40 |
| 8 | 4 | Elsie BALDWIN | 11 | Hinckley | 3:07.00 |