EVENT 229 Womens MC 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 1 | Grace WOOD | 15 | Barnstaple | 5:33.92 |
| 3 | 2 | Cody BROAD | 16 | TauntonDeane | 5:33.80 |
| 4 | 3 | Evie BRADY | 15 | Aquae Sulis | 5:33.50 |
| 5 | 4 | Phoebe KELMAN-JOHNS | 14 | Yeovil | 5:33.21 |
| 6 | 5 | Charlotte PURVIS | 13 | Swindon Dolp | 5:33.20 |
| 7 | 6 | Eleanor LLOYD | 14 | Gloucester | 5:32.46 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 7 | Elizabeth ALLEN | 14 | SGSWDRSW | 5:32.36 |
| 2 | 8 | Evie-Rose YOUNG | 13 | Co Bristol | 5:31.25 |
| 3 | 9 | Hannah CROKER | 15 | Aquae Sulis | 5:29.87 |
| 4 | 10 | Catherine NAUS | 15 | Swindon Dolp | 5:29.82 |
| 5 | 11 | Madeline SOPER | 13 | Weston S M | 5:29.35 |
| 6 | 12 | Rhiannon EVANS | 12 | Millfield | 5:28.71 |
| 7 | 13 | Yuhka MACHINO | 13 | Millfield | 5:28.50 |
| 8 | 14 | Maia CRUDGINGTON | 14 | Aquae Sulis | 5:28.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 15 | Jessica PART | 13 | Severnside | 5:27.27 |
| 2 | 16 | Nia WESTLAKE | 23 | Cinderford | 5:25.31 |
| 3 | 17 | Victoria ADAMS | 14 | Plymouth Lea | 5:23.58 |
| 4 | 18 | Isabelle HEPBURN | 14 | S Bournem'th | 5:23.00 |
| 5 | 19 | Tamsin EDGE | 16 | Bourmth Coll | 5:22.75 |
| 6 | 20 | Freya KING | 14 | Weston S M | 5:21.90 |
| 7 | 21 | Jasmine STONE | 15 | Soundwell | 5:21.87 |
| 8 | 22 | Abi RAWLINGS | 17 | Mt Kelly | 5:21.40 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 23 | Stephanie CUMMINS | 16 | Co Bristol | 5:20.19 |
| 2 | 24 | Thea O'KEEFE | 16 | Poole | 5:18.85 |
| 3 | 25 | Rosie HOLLAND | 15 | Mt Kelly | 5:18.03 |
| 4 | 26 | Megan VINGOE | 14 | Carn Brea | 5:17.86 |
| 5 | 27 | Jorji LONGDON | 17 | Gloucester | 5:17.45 |
| 6 | 28 | Ella CHOWN | 13 | Bourmth Coll | 5:17.02 |
| 7 | 29 | Delphi EVANS | 14 | Severnside | 5:16.77 |
| 8 | 30 | Charlotte EMERY | 13 | Exeter City | 5:16.43 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 31 | Amy GORDON | 15 | Aquae Sulis | 5:16.30 |
| 2 | 32 | Holly HUDGHTON | 15 | Weston S M | 5:16.04 |
| 3 | 33 | Georgina LOCKE | 15 | Southwold | 5:15.15 |
| 4 | 34 | Misty MARSHALL-WELLING | 15 | Aquae Sulis | 5:15.09 |
| 5 | 35 | Polly PAINTER | 14 | Millfield | 5:14.81 |
| 6 | 36 | Kiera NOON | 16 | Co Bristol | 5:13.90 |
| 7 | 37 | Rhiannon BOWEN | 15 | Aquae Sulis | 5:13.70 |
| 8 | 38 | Bethan BLAKELOCK | 17 | Gloucester | 5:13.42 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 39 | Alice BARTON | 13 | Aquae Sulis | 5:12.70 |
| 2 | 40 | Christina MCDOWELL | 17 | Mt Kelly | 5:12.31 |
| 3 | 41 | Georgina DENNIS | 14 | Mt Kelly | 5:12.23 |
| 4 | 42 | Amy MILLS | 15 | Bourmth Coll | 5:12.20 |
| 5 | 43 | Lauren MATTHEWS | 19 | Swindon Dolp | 5:08.09 |
| 6 | 44 | Thalia POAROS | 15 | Mt Kelly | 5:07.70 |
| 7 | 45 | Aliyah-Mai WEBB | 16 | Exeter City | 5:07.60 |
| 8 | 46 | Emily EVELING | 14 | Mt Kelly | 5:03.72 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 48 | Jessica RICHENS | 17 | S Bournem'th | 5:02.83 |
| 2 | 50 | Lily BOOKER | 15 | Co Bristol | 4:59.05 |
| 3 | 52 | Daniella WHITING | 19 | Aquae Sulis | 4:56.00 |
| 4 | 54 | Emily SIEBRECHT | 19 | Bath Univ | 4:47.30 |
| 5 | 53 | Sophia WILSON | 15 | Millfield | 4:47.90 |
| 6 | 51 | Olivia BUTLER | 13 | Co Bristol | 4:56.55 |
| 7 | 49 | Lucy PEARCE | 19 | S Bournem'th | 5:00.89 |
| 8 | 47 | Molly FRANCIS | 15 | Mt Kelly | 5:03.23 |