EVENT 301 Girls Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Aurora-mar FOGATO | 13 | Co Manch Aq | 7:15.39 |
| 2 | 3 | Kirsten CRELLIN | 11 | Nuneaton | 7:15.00 |
| 3 | 5 | Sedona REED | 10 | Co Leeds | 6:45.00 |
| 4 | 7 | Hannah SMITH | 10 | Co Leeds | 6:44.20 |
| 5 | 6 | Eleanor COULTER | 11 | Nuneaton | 6:44.30 |
| 6 | 4 | Erin THORN | 11 | Co Leeds | 7:09.50 |
| 7 | 2 | Mae JOHNSTONE | 11 | Co Leeds | 7:15.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 9 | Millie WILLIAMS | 10 | Co Leeds | 6:34.40 |
| 1 | 11 | Amy LITTLE | 14 | Co Manch Aq | 6:29.80 |
| 2 | 13 | Molly BAKER | 11 | Co Sheffield | 6:28.90 |
| 3 | 15 | Sophia KELLY | 11 | Co Leeds | 6:26.70 |
| 4 | 17 | Maeve CARROLL | 10 | Co Leeds | 6:19.40 |
| 5 | 16 | Nell WILLIAMS | 10 | Co Leeds | 6:25.70 |
| 6 | 14 | Ellie DIBB | 12 | Co Leeds | 6:27.62 |
| 7 | 12 | Lucy SHAW | 14 | Co Sheffield | 6:29.68 |
| 8 | 10 | Tahlia MULLEAGUE | 12 | Co Sheffield | 6:29.90 |
| 9 | 8 | Megan HELM | 12 | Co Sheffield | 6:42.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 19 | Christina BLACK | 11 | Co Leeds | 6:18.90 |
| 1 | 21 | Tori CRADDOCK | 12 | Nuneaton | 6:15.90 |
| 2 | 23 | Casey CLEAVER | 12 | Co Lincoln P | 6:15.00 |
| 3 | 25 | Mischa COMRIE | 11 | Co Leeds | 6:11.80 |
| 4 | 27 | Holly MACDONALD | 12 | Co Leeds | 6:02.90 |
| 5 | 26 | Ruby GURUNG | 12 | Co Birm'ham | 6:08.91 |
| 6 | 24 | Charlotte GLEDHILL | 11 | Nuneaton | 6:12.90 |
| 7 | 22 | Phoebe COOPER | 10 | Co Sheffield | 6:15.90 |
| 8 | 20 | Molly ROBERTS | 14 | Halifax | 6:17.20 |
| 9 | 18 | Ella STARLING | 11 | Co Sheffield | 6:19.30 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 29 | Lucy SULLIVAN | 16 | Halifax | 6:02.00 |
| 1 | 31 | Lucy SIMPSON | 13 | Nuneaton | 5:59.10 |
| 2 | 33 | Gracie SHEPHERD | 13 | Co Sheffield | 5:55.10 |
| 3 | 35 | Megan BURNELL | 12 | Co Leeds | 5:52.40 |
| 4 | 37 | Philippa BROMLEY | 11 | Co Leeds | 5:51.47 |
| 5 | 36 | Aine HUGHES | 13 | Co Sheffield | 5:51.67 |
| 6 | 34 | Evie LYNCH | 15 | Nuneaton | 5:53.60 |
| 7 | 32 | Aliya MSAOUBI | 13 | Co Sheffield | 5:57.80 |
| 8 | 30 | Lucy SKINNER | 12 | Flint | 6:01.40 |
| 9 | 28 | Lucy ALLMAN | 12 | Co Leeds | 6:02.60 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 39 | Charlotte CLARKE | 13 | Co Leeds | 5:49.80 |
| 1 | 41 | Emily UNSWORTH | 14 | Co Manch Aq | 5:45.44 |
| 2 | 43 | Maia NOONAN | 12 | Co Birm'ham | 5:44.90 |
| 3 | 45 | Sasha LONG | 11 | Co Leeds | 5:44.30 |
| 4 | 47 | Faith BLAIN | 13 | Co Leeds | 5:36.10 |
| 5 | 46 | Megan NICKLIN | 12 | Co Birm'ham | 5:41.54 |
| 6 | 44 | Martha CALLAGHAN | 11 | Co Leeds | 5:44.30 |
| 7 | 42 | Charlotte BERRY | 13 | Co Sheffield | 5:45.00 |
| 8 | 40 | Evie GLOSSOP | 12 | Co Sheffield | 5:45.50 |
| 9 | 38 | Isabella SHERING | 11 | Co Sheffield | 5:50.00 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 49 | Jasmine STOCKTON | 14 | Co Manch Aq | 5:32.59 |
| 1 | 51 | Megan BELLHOUSE-SMITH | 16 | Co Leeds | 5:27.80 |
| 2 | 53 | Sophie BAKER | 13 | Chesterfield | 5:21.65 |
| 3 | 55 | Alexandra STRINGER | 17 | Bo Kirklees | 5:10.30 |
| 4 | 57 | Chloe HIRST | 15 | Bo Kirklees | 5:06.47 |
| 5 | 56 | Erin HOYLAND | 15 | Co Manch Aq | 5:09.96 |
| 6 | 54 | Kidiest HODGSON | 13 | Co Leeds | 5:15.30 |
| 7 | 52 | Emily CONWAY | 15 | Co Manch Aq | 5:26.80 |
| 8 | 50 | Rosie HEPWORTH | 15 | Co Leeds | 5:30.00 |
| 9 | 48 | Emily-Grace WILLIAMS | 14 | Flint | 5:32.79 |