| Heat Number - 1 | ||||||
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 1 | Grace Harvey | 21 | S6 | Hoddesdon | 5:59.23 |
| 1 | 3 | Maisie Summers-Newton | 17 | S6 | Northampton | 5:23.91 |
| 2 | 5 | Katie Crowhurst | 15 | S13 | Wycombe Dist | 5:16.18 |
| 3 | 7 | Abby Kane | 16 | S13 | N Ayrshire | 5:00.55 |
| 4 | 9 | Zara Mullooly | 17 | S10 | Guildford Ct | 4:44.99 |
| 5 | 8 | Toni Shaw | 16 | S9 | Aberdeen Per | 4:46.38 |
| 6 | 6 | Brock Whiston | 23 | S8 | Bark & Dagen | 5:07.72 |
| 7 | 4 | Eleanor Simmonds | 25 | S6 | Camden Swiss | 5:19.27 |
| 8 | 2 | Charlotte Hyde | 17 | S7 | Camden Swiss | 5:42.40 |