EVENT 404 Womens MC 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 1 | Ellie Spokes | 13 | S6 | Loughborough | 9:05.85 |
| 2 | 3 | Georgia Howell | 14 | S6 | Littleh'pton | 8:30.62 |
| 3 | 5 | Angharad Wightwick | 14 | S8 | London Dis | 7:41.84 |
| 4 | 7 | Megan Atkinson | 16 | S6 | Peterlee | 7:23.24 |
| 5 | 6 | Genevieve Hunter | 14 | S8 | Beachfield | 7:24.31 |
| 6 | 4 | Ella O'Donnell | 13 | S7 | Man & NW Dis | 8:04.90 |
| 7 | 2 | Elizabeth Foster | 12 | S8 | Havant & Wat | 8:49.85 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 9 | Samantha Lewis | 24 | S9 | Satellite | 7:12.30 |
| 2 | 11 | Rebecca Franks | 19 | S9 | Gainsborough | 6:50.75 |
| 3 | 13 | Fabienne Andre | 20 | S8 | Mid Sussex | 6:38.11 |
| 4 | 15 | Hollie Pinder | 14 | S9 | Adwick | 6:33.63 |
| 5 | 14 | Seren Leconte | 12 | S9 | Caerphilly | 6:37.47 |
| 6 | 12 | Charlotte Hyde | 14 | S7 | Bark & Dagen | 6:43.54 |
| 7 | 10 | Sallie Phillips | 17 | S8 | Gloucester | 6:52.91 |
| 8 | 8 | Madeleine Harris | 13 | S9 | Elmbridge | 7:16.83 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 17 | Anya Falkus | 14 | S13 | Wisbech | 6:22.30 |
| 2 | 19 | Levana Hanson | 16 | S8 | Gloucester | 6:09.26 |
| 3 | 21 | Olivia-Mae Cameron | 17 | S8 | Mt Kelly | 5:58.24 |
| 4 | 23 | Beth Johnston | 15 | S10 | B.E.S.T. | 5:46.43 |
| 5 | 22 | Maisie Summers-Newton | 14 | S6 | Northampton | 5:56.76 |
| 6 | 20 | Porsha Jones | 14 | S10 | Shrewsbury | 6:09.18 |
| 7 | 18 | Olivia Pickering | 16 | S8 | Gloucester | 6:20.14 |
| 8 | 16 | G Cooper-Holmes | 16 | S7 | Cockermouth | 6:28.93 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 25 | Grace Harvey | 18 | S7 | Hoddesdon | 5:41.78 |
| 2 | 27 | Rebecca Lewis | 13 | S10 | RCT Squad | 5:37.56 |
| 3 | 29 | Hope Gordon | 22 | S9 | StirlingSwim | 5:35.27 |
| 4 | 31 | Eleanor Robinson | 15 | S6 | Northampton | 5:27.53 |
| 5 | 30 | Eleanor Bamber | 20 | S10 | Satellite | 5:32.20 |
| 6 | 28 | Bethan Eckley | 16 | S10 | Co Cardiff | 5:36.83 |
| 7 | 26 | Katie Crowhurst | 12 | S13 | Wycombe Dist | 5:41.65 |
| 8 | 24 | Drew Stables | 14 | S10 | Copeland | 5:45.70 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 33 | Cara Smyth | 15 | S10 | Incas | 5:11.35 |
| 2 | 35 | Coral Farrell | 15 | S10 | Warrington W | 5:07.40 |
| 3 | 37 | Zara Mullooly | 14 | S10 | Guildford Ct | 4:53.80 |
| 4 | 39 | Jessica-Jane Applegate | 20 | S14 | UEA Norwich | 4:28.99 |
| 5 | 38 | Lily Macleod | 15 | S13 | Mt Kelly | 4:49.78 |
| 6 | 36 | Toni Shaw | 13 | S10 | Cults Otters | 5:02.60 |
| 7 | 34 | Harriet Dickinson | 19 | S10 | Gloucester | 5:09.72 |
| 8 | 32 | Molly Hopkins | 13 | S9 | Neath | 5:20.97 |