EVENT 306 Womens Open 400m Individual Medley - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 1 | Ella Farley | 15 | Exeter City | 5:21.31 |
| 3 | 2 | Stephanie Cummins | 15 | Co Bristol | 5:20.24 |
| 4 | 3 | Zoe Rolls | 15 | Millfield | 5:17.63 |
| 5 | 4 | Madeline Hamlett | 17 | Street | 5:16.66 |
| 6 | 5 | Elisha Hawkins | 16 | Yeovil | 5:15.92 |
| 7 | 6 | Imogen Moroney | 15 | Weston S M | 5:15.50 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 7 | Angela Staffieri | 15 | Newquay | 5:15.18 |
| 1 | 8 | Bethan Blakelock | 16 | Gloucester | 5:15.05 |
| 2 | 9 | Danielle Baker | 17 | Mt Kelly | 5:14.55 |
| 3 | 10 | Jorji Longdon | 16 | Soundwell | 5:14.26 |
| 4 | 11 | Bethan O'Hara | 17 | Seagulls Swi | 5:11.70 |
| 5 | 12 | Molina Smalley | 17 | Plymouth Lea | 5:11.46 |
| 6 | 13 | Pixie Lale-Klasicki | 19 | Soundwell | 5:11.45 |
| 7 | 14 | Charlotte James | 15 | Bourmth Coll | 5:10.97 |
| 8 | 15 | Emma Shilton | 15 | Millfield | 5:08.97 |
| 9 | 16 | Isabel Compton | 17 | Cheltenham | 5:08.46 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 18 | Lauren Matthews | 18 | Swindon Dolp | 5:06.68 |
| 1 | 20 | Jessica Richens | 16 | S Bournem'th | 5:03.03 |
| 2 | 22 | Leah Picillo | 18 | Mt Kelly | 4:59.57 |
| 3 | 24 | Isabel Jones | 15 | Millfield | 4:56.79 |
| 4 | 26 | Yael Danieli | 18 | Plymouth Lea | 4:51.69 |
| 5 | 25 | Chloe Edrich | 16 | TauntonDeane | 4:54.77 |
| 6 | 23 | Daniella Whiting | 18 | Aquae Sulis | 4:58.60 |
| 7 | 21 | Charlotte Pitts | 19 | Yeovil | 5:02.05 |
| 8 | 19 | Tegan Frizelle | 15 | Plymouth Lea | 5:05.13 |
| 9 | 17 | Jessie Foster | 17 | Aquae Sulis | 5:07.10 |