EVENT 98 Womens 15 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Erica Varney | 15 | Street | 5:24.55 |
| 2 | 2 | Holly Harris | 15 | Poole | 5:23.94 |
| 3 | 3 | Ella Parker | 15 | Chippenham | 5:22.89 |
| 4 | 4 | Amelie Goodrum | 15 | Exeter City | 5:22.09 |
| 5 | 5 | Amy Gibbons | 15 | Chippenham | 5:20.78 |
| 6 | 6 | Lauren East | 15 | S Bournem'th | 5:19.05 |
| 7 | 7 | Jessica Part | 15 | Severnside | 5:18.84 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 8 | Justine Rannou | 15 | Exeter City | 5:18.72 |
| 1 | 9 | Ellie Vaughan | 16 | Gloucester | 5:18.59 |
| 2 | 10 | Jasmine Stone | 17 | Soundwell | 5:18.40 |
| 3 | 11 | Isobel Howgate | 15 | Barnstaple | 5:16.93 |
| 4 | 12 | Amy Mills | 17 | Seagulls SC | 5:15.78 |
| 5 | 13 | Madeleine Soper | 15 | Weston S M | 5:14.80 |
| 6 | 14 | Kathleen Baker | 30 | Poole | 5:14.45 |
| 7 | 15 | Victoria Adams | 16 | Plymouth Lea | 5:13.73 |
| 8 | 16 | Megan Adamson | 15 | Swindon Dolp | 5:12.30 |
| 9 | 17 | Polly Painter | 16 | Millfield | 5:11.30 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 19 | Isabelle Hepburn | 16 | Poole | 5:08.59 |
| 1 | 21 | Laura Stephens | 19 | Plymouth Lea | 5:07.60 |
| 2 | 23 | Kiera Noon | 18 | Co Bristol | 5:01.74 |
| 3 | 25 | Holly Hudghton | 17 | TauntonDeane | 4:59.45 |
| 4 | 27 | Lily Booker | 17 | Co Bristol | 4:49.80 |
| 5 | 26 | Olivia Butler | 15 | Co Bristol | 4:55.51 |
| 6 | 24 | Aliyah-Mai Webb | 18 | Exeter City | 5:01.50 |
| 7 | 22 | Oriana Munden | 17 | Co Bristol | 5:03.38 |
| 8 | 20 | Megan Vingoe | 16 | Carn Brea | 5:07.70 |
| 9 | 18 | Aimee Carter | 24 | Cheltenham | 5:10.19 |