EVENT 302 Womens MC 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 2 | Rosie Sheridan | 15 | S6 | StirlingSwim | 9:37.40 |
| 2 | 4 | Charlotte McGuinness | 17 | S6 | Harrogate | 8:22.56 |
| 3 | 6 | Elizabeth Foster | 14 | S8 | Havant & Wat | 7:17.53 |
| 4 | 8 | Fern Sneddon | 12 | S6 | RTW Monson | 7:03.47 |
| 5 | 7 | Kate Bolan | 14 | S12 | Livingston | 7:03.48 |
| 6 | 5 | Rachel Agar | 12 | S9 | Bark & Dagen | 8:02.39 |
| 7 | 3 | Ellie Spokes | 15 | S6 | Nova Cent'n | 8:24.05 |
| 8 | 1 | Isla Gordon | 12 | S8 | Nova Cent'n | 10:01.11 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 10 | Anna Evans | 30 | S12 | Orion | 6:57.48 |
| 2 | 12 | Scarlett Humphrey | 13 | S11 | Northampton | 6:49.42 |
| 3 | 14 | Eliza Humphrey | 13 | S11 | Northampton | 6:43.83 |
| 4 | 16 | Samantha Lewis | 26 | S8 | Satellite | 6:29.64 |
| 5 | 15 | Georgia Howell | 16 | S7 | Littleh'pton | 6:40.76 |
| 6 | 13 | Eva French | 11 | S10 | Nuneaton | 6:44.86 |
| 7 | 11 | Genevieve Hunter | 16 | S8 | Kent Weald | 6:53.69 |
| 8 | 9 | Emily-Jane Surgeoner | 11 | S9 | Orion | 7:01.18 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 18 | Jordan Quinn | 17 | S9 | Putteridge | 6:19.08 |
| 2 | 20 | Rachael Partington | 13 | S10 | Co Manch Aq | 6:09.51 |
| 3 | 22 | Madeleine Harris | 15 | S9 | Elmbridge | 6:07.98 |
| 4 | 24 | Porsha Jones | 16 | S10 | Shrewsbury | 6:00.26 |
| 5 | 23 | Charlotte Hyde | 16 | S7 | Camden Swiss | 6:01.30 |
| 6 | 21 | Ella Cooper-Holmes | 18 | S7 | Co Manch Aq | 6:09.01 |
| 7 | 19 | Erin Swann | 17 | S10 | Motherwell W | 6:09.75 |
| 8 | 17 | Hollie Pinder | 16 | S9 | Adwick | 6:21.30 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 26 | Eleanor Bamber | 22 | S10 | Man & NW Dis | 5:47.85 |
| 2 | 28 | Seren Leconte | 14 | S9 | RCT Squad | 5:38.10 |
| 3 | 30 | Grace Harvey | 20 | S6 | Hoddesdon | 5:29.66 |
| 4 | 32 | Eleanor Simmonds | 24 | S6 | Camden Swiss | 5:26.20 |
| 5 | 31 | Maisie Summers-Newton | 16 | S6 | Northampton | 5:26.97 |
| 6 | 29 | Ailbhe Kelly | 20 | S8 | Ireland | 5:34.00 |
| 7 | 27 | Maya Brisco | 18 | S9 | Staines | 5:45.00 |
| 8 | 25 | Catherine Marr | 16 | S13 | Norwich Swan | 5:56.16 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 34 | Beth Johnston | 17 | S10 | B.E.S.T. | 5:19.52 |
| 2 | 36 | Coral Farrell | 17 | S10 | Warrington W | 5:03.79 |
| 3 | 38 | Abby Kane | 15 | S13 | N Ayrshire | 4:59.83 |
| 4 | 40 | Toni Shaw | 15 | S9 | Aberdeen Per | 4:42.43 |
| 5 | 39 | Zara Mullooly | 16 | S10 | Guildford Ct | 4:42.64 |
| 6 | 37 | Brock Whiston | 22 | S10 | Bark & Dagen | 4:59.94 |
| 7 | 35 | Katie Crowhurst | 14 | S13 | Wycombe Dist | 5:16.96 |
| 8 | 33 | Rebecca Lewis | 15 | S10 | RCT Squad | 5:20.10 |