| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 1 | Natalie Barker | 17 | Northall'ton | |
| 3 | 2 | Josiah Stanley | 12 | Northall'ton | 1:08.05 |
| 4 | 3 | Rebecca Wilkin | 11 | Northall'ton | 45.38 |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 4 | Jack Leggott | 11 | Northall'ton | 44.60 |
| 2 | 6 | Maisie Hart | 12 | Northall'ton | 40.13 |
| 3 | 8 | Louis Bishoprick | 15 | Northall'ton | 33.22 |
| 4 | 7 | Rose Jolly | 13 | Northall'ton | 34.30 |
| 5 | 5 | Madeleine Cann | 13 | Northall'ton | 44.25 |