EVENT 701 Female 12 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Elizabeth SANDERS | 12 | Gwich Royals | 6:31.80 |
| 4 | 3 | Savannah ELLERINGTON | 12 | Thanet Swim | 6:25.20 |
| 5 | 2 | Amelia GOODE | 12 | Beckenham | 6:30.50 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Elsie SAFFER | 12 | RTW Monson | 6:20.40 |
| 2 | 7 | Tyla-Jade THOMAS | 12 | MwayMaritime | 6:10.80 |
| 3 | 9 | Jada YANKEY | 12 | Bromley | 6:04.80 |
| 4 | 12 | Ava COOK | 13 | White Cliffs | 6:03.30 |
| 5 | 10 | Isabelle HEALY | 12 | Gwich Royals | 6:04.60 |
| 6 | 8 | Martha RICKARD | 12 | Bromley | 6:10.50 |
| 7 | 6 | Ruth ALLEN | 12 | Saxon Crown | 6:12.80 |
| 8 | 4 | Evelyn CARSON | 12 | Dover Life | 6:24.70 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 14 | Isabelle MAY | 13 | Maidstone SC | 5:58.10 |
| 1 | 16 | Sum Yau TSE | 13 | Tonbridge | 5:57.00 |
| 2 | 18 | Holly CALVERT | 13 | Edenbridge | 5:54.90 |
| 3 | 21 | Nel DZIKI | 13 | RTW Monson | 5:49.80 |
| 4 | 23 | Lola BOURNER | 13 | Sevenoaks | 5:49.40 |
| 5 | 22 | Olivia COOLEY | 14 | RTW Monson | 5:49.80 |
| 6 | 19 | Poppy TRAYNIER | 14 | Beckenham | 5:50.80 |
| 7 | 17 | Rosie HOLLANDS | 13 | Dover Life | 5:55.70 |
| 8 | 15 | Bella FLAVIN | 13 | Sevenoaks | 5:57.30 |
| 9 | 13 | Elise BUTLER | 12 | Maidstone SC | 6:02.10 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 25 | Daisy SMITH | 15 | Bexley | 5:43.20 |
| 1 | 27 | Mae DAVIES | 14 | RTW Monson | 5:43.10 |
| 2 | 30 | Grace HOLMES | 15 | RTW Monson | 5:42.60 |
| 3 | 33 | Natasha GREER | 17 | Gwich Royals | 5:39.42 |
| 4 | 35 | Paris FAIRHURST | 14 | White Oak | 5:38.50 |
| 5 | 34 | Phoebe GAGE | 16 | RTW Monson | 5:38.60 |
| 6 | 32 | Emily PIETERSMA | 14 | Bexley | 5:40.50 |
| 7 | 28 | Hannah STROVER | 19 | Orpington OJ | 5:42.77 |
| 8 | 26 | Ruby WALLER | 16 | Sevenoaks | 5:43.18 |
| 9 | 24 | Sophia STIRRUPS | 13 | Thanet Swim | 5:46.50 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 37 | Amelia JAMES | 16 | Maidstone SC | 5:37.50 |
| 1 | 39 | Maddison NOTLEY | 15 | MwayMaritime | 5:37.00 |
| 2 | 42 | Jessica GOODWIN | 18 | Black Lion | 5:32.70 |
| 3 | 44 | Calyssa BRADSHAW | 15 | Black Lion | 5:31.90 |
| 4 | 46 | Martha WARNER | 15 | Bromley | 5:30.90 |
| 5 | 45 | Bella JONES | 14 | RTW Monson | 5:31.20 |
| 6 | 43 | Emilia NARKEVIC | 14 | Maidstone SC | 5:32.00 |
| 7 | 40 | Julia ELVIDGE | 13 | RTW Monson | 5:36.00 |
| 8 | 38 | Poppy TAYLOR | 15 | Thanet Swim | 5:37.02 |
| 9 | 36 | Isla TURNER | 14 | White Oak | 5:38.30 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 49 | Jessica LONG | 13 | Bromley | 5:29.20 |
| 1 | 51 | Olivia NORLEY | 14 | RTW Monson | 5:28.60 |
| 2 | 53 | Lowri WILLIAMS | 14 | RTW Monson | 5:27.80 |
| 3 | 55 | Arianne IVANOVA | 15 | Thanet Swim | 5:26.00 |
| 4 | 57 | Abbie OUTRAM | 18 | Black Lion | 5:24.54 |
| 5 | 56 | Veronique CROZET | 15 | Gwich Royals | 5:24.90 |
| 6 | 54 | Ella-Louise DOYLE | 18 | Gwich Royals | 5:27.40 |
| 7 | 52 | Reese HUCKLE | 15 | RTW Monson | 5:28.20 |
| 8 | 50 | Zoe TOLLIT | 14 | RTW Monson | 5:29.00 |
| 9 | 47 | Lola BOWRA | 14 | Sevenoaks | 5:29.50 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 59 | Amy CONNER | 18 | Black Lion | 5:22.90 |
| 1 | 61 | Madeleine HIND | 15 | RTW Monson | 5:18.30 |
| 2 | 63 | Annie SANDERS | 17 | Bromley | 5:16.50 |
| 3 | 65 | Ivy HAGGERTY | 16 | Thanet Swim | 5:13.40 |
| 4 | 68 | Amalie SMITH | 15 | RTW Monson | 4:50.50 |
| 5 | 67 | Emilia OLIVER | 16 | RTW Monson | 5:03.60 |
| 6 | 64 | Lilia FORNASIER | 16 | RTW Monson | 5:14.11 |
| 7 | 62 | Scarlett DAVIE | 16 | Sevenoaks | 5:17.00 |
| 8 | 60 | Mia HUGHES | 15 | Bromley | 5:21.50 |
| 9 | 58 | Cara NEAL | 15 | Sevenoaks | 5:23.51 |