EVENT 21 Female 200m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Felicity MARSHALL | 12 | Deepings | 4:06.64 |
| 2 | 2 | Bethany MEAKIN | 11 | Grantham | 4:02.49 |
| 3 | 3 | Florence MCCLURE | 10 | Lincoln TSA | 3:45.14 |
| 4 | 4 | Annabel HILLSON | 11 | Grantham | 3:39.62 |
| 5 | 5 | Skye WARREN | 12 | Lincoln TSA | 3:39.19 |
| 6 | 6 | Emily CLAYTON | 11 | Grantham | 3:38.97 |
| 7 | 7 | Evelyn NICHOLLS | 12 | Grantham | 3:37.56 |
| 8 | 8 | Evelyn LITTLE | 11 | Lincoln Vulc | 3:30.32 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Alicja ODROBINSKA | 13 | Deepings | 3:30.31 |
| 2 | 10 | Niamh O'CONNOR | 12 | Louth | 3:30.00 |
| 3 | 11 | Scarlett ROBERTS | 12 | Lincoln Vulc | 3:27.07 |
| 4 | 12 | Sophie HODSON | 15 | Deepings | 3:25.00 |
| 5 | 13 | Chloe GOACHER | 12 | Grantham | 3:20.99 |
| 6 | 14 | Poppy-Rose WILSON | 11 | Deepings | 3:19.25 |
| 7 | 15 | Olivia CHARITY | 14 | Grantham | 3:18.46 |
| 8 | 16 | Emmeline GLEAVE | 10 | Grantham | 3:17.79 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Jasmine CHEETHAM | 12 | Lincoln Vulc | 3:13.50 |
| 2 | 18 | Victoria MCKAY | 12 | Gainsborough | 3:12.00 |
| 3 | 19 | Ava-Grace GREGORY | 14 | Grantham | 3:11.20 |
| 4 | 20 | Jessica SPECK | 15 | Lincoln Vulc | 3:10.92 |
| 5 | 21 | Luiza KOZIOL | 17 | Lincoln TSA | 3:10.08 |
| 6 | 22 | Phoebe CHARMAN | 16 | Lincoln TSA | 3:10.00 |
| 7 | 23 | Izabella ZANIEWSKA | 13 | Boston | 3:08.88 |
| 8 | 24 | Honey FLOWER | 11 | Grantham | 3:05.17 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 25 | Arin ELVIDGE | 12 | Lincoln Vulc | 3:03.30 |
| 2 | 26 | Ella KHAMA | 12 | Grantham | 3:01.32 |
| 3 | 27 | Colette GRANTHAM | 12 | Lincoln Vulc | 3:00.89 |
| 4 | 28 | Amy FOSTER | 12 | Louth | 3:00.70 |
| 5 | 29 | Madeline SURTEES | 13 | Grantham | 3:00.62 |
| 6 | 30 | Annabel SHEPHERD | 13 | Deepings | 2:57.10 |
| 7 | 31 | Caitlin CROSS | 13 | Lincoln Vulc | 2:56.38 |
| 8 | 32 | Emilija IVANOVA | 17 | Boston | 2:55.73 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 33 | Robyn CROSS | 13 | Lincoln Vulc | 2:55.18 |
| 2 | 34 | Orla BAILEY | 15 | Deepings | 2:55.03 |
| 3 | 35 | Emily HUNT | 16 | Lincoln Vulc | 2:52.20 |
| 4 | 37 | Lucy ABBOTT | 14 | Grantham | 2:50.74 |
| 5 | 38 | Aoife HICKEY | 11 | Deepings | 2:50.73 |
| 6 | 39 | Madeleine SEAGROATT | 13 | Louth | 2:50.04 |
| 7 | 40 | Jessica - Rose DAVISON | 16 | Grantham | 2:50.00 |
| 8 | 41 | Amy BARKER | 12 | Lincoln Vulc | 2:48.59 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 44 | Sally NORMAN | 38 | Boston | 2:44.25 |
| 2 | 47 | Amelia BIRD | 15 | Skegness | 2:40.42 |
| 3 | 49 | Emily TALKES | 14 | Grantham | 2:33.51 |
| 4 | 51 | Chloe DAYBELL | 21 | Grantham | 2:26.00 |
| 5 | 50 | Maisie MATTHEWS | 15 | Louth | 2:30.53 |
| 6 | 48 | Evie NEWMAN | 13 | Lincoln Vulc | 2:39.33 |
| 7 | 46 | Lottie Ava FLATTERS | 13 | Deepings | 2:41.08 |
| 8 | 43 | Arabella PEARCE | 13 | Louth | 2:45.39 |