EVENT 101 Boys/Girls 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Kitty LAMB | 12 | South Lincs | 11:34.86 |
| 2 | 3 | Skye HOLMES | 13 | Louth | 11:08.79 |
| 3 | 5 | Sophie COOKSEY | 13 | Louth | 10:59.10 |
| 4 | 7 | Lucy WILSON | 13 | South Lincs | 10:54.19 |
| 5 | 6 | Helena FIELD | 14 | Louth | 10:54.60 |
| 6 | 4 | Amy PALMER | 12 | Co Lincoln P | 11:00.53 |
| 7 | 2 | James HUCKLE | 12 | Lincoln Vulc | 11:22.37 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Rianna ABBOTT | 15 | Grantham | 10:42.88 |
| 2 | 11 | Matthew TOMPKINSON | 14 | Louth | 10:38.86 |
| 3 | 13 | Charlie BISBY | 12 | South Lincs | 10:33.38 |
| 4 | 15 | Harry VICKERS | 15 | Lincoln Vulc | 10:29.87 |
| 5 | 14 | Madeleine SMIRTHWAITE | 15 | Co Lincoln P | 10:32.61 |
| 6 | 12 | Charlotte BEMROSE | 15 | Louth | 10:33.79 |
| 7 | 10 | Daniel HEPPLESTONE | 13 | Lincoln Vulc | 10:40.54 |
| 8 | 8 | Lexie HAMILTON | 14 | South Lincs | 10:52.90 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Olivia SPENCER | 17 | Lincoln Vulc | 10:26.06 |
| 2 | 19 | Amelia CHRISPIN | 18 | Lincoln Vulc | 10:21.69 |
| 3 | 21 | Evie LILLEY | 14 | Lincoln Vulc | 10:20.69 |
| 4 | 23 | Lilli BOWMAN | 16 | South Lincs | 10:15.57 |
| 5 | 22 | Evelyn JACKSON | 15 | Lincoln Vulc | 10:19.60 |
| 6 | 20 | Daniel DEGNAN | 15 | Grantham | 10:20.76 |
| 7 | 18 | Archie FRENCH | 14 | Lincoln Vulc | 10:22.82 |
| 8 | 16 | Gracie-May COLE | 15 | Co Lincoln P | 10:28.67 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 25 | Lillie HAMILTON | 15 | South Lincs | 10:13.48 |
| 2 | 27 | Morgan FARRAR | 14 | Co Lincoln P | 10:12.52 |
| 3 | 29 | Jensen HYLTON | 15 | Co Lincoln P | 10:08.87 |
| 4 | 31 | Hannah BRUCE | 14 | South Lincs | 10:07.28 |
| 5 | 30 | Charlotte HODGIN | 15 | Co Lincoln P | 10:08.51 |
| 6 | 28 | Jake ADAMS | 16 | Louth | 10:11.69 |
| 7 | 26 | William TAYLOR | 15 | Louth | 10:12.61 |
| 8 | 24 | Zara DIXON | 15 | Co Lincoln P | 10:13.70 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 33 | Elena ALDENHOFF-KELLY | 15 | Grantham | 10:02.41 |
| 2 | 35 | Jacob FISH | 14 | Grantham | 9:57.63 |
| 3 | 37 | Lilli-Rose CARR | 14 | Co Lincoln P | 9:56.25 |
| 4 | 39 | Evan NOORPURI | 16 | Lincoln Vulc | 9:53.91 |
| 5 | 38 | Grace MACDONALD | 14 | Grantham | 9:54.59 |
| 6 | 36 | Beatrice FINCH | 17 | South Lincs | 9:56.70 |
| 7 | 34 | Olivia ANSTEY | 15 | Louth | 9:59.19 |
| 8 | 32 | Alexandra HALLAM-STOTT | 17 | Grantham | 10:07.04 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 41 | Zach HOPKINSON | 14 | Grantham | 9:50.64 |
| 2 | 43 | Matteo MONACO | 14 | South Lincs | 9:45.69 |
| 3 | 45 | Kieran NG | 13 | South Lincs | 9:43.38 |
| 4 | 47 | Francesca HALLAM-STOTT | 16 | Grantham | 9:30.47 |
| 5 | 46 | Ryan NORTON | 16 | Boston | 9:41.00 |
| 6 | 44 | Chloe HOPKINSON | 18 | Grantham | 9:45.22 |
| 7 | 42 | Grace TURNER | 16 | Grantham | 9:48.00 |
| 8 | 40 | Katie MALONEY | 26 | Lincoln Vulc | 9:52.24 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 49 | Joshua CLARKE | 15 | Grantham | 9:19.89 |
| 2 | 51 | Oliver SORRELL | 16 | South Lincs | 9:11.40 |
| 3 | 53 | Alex SADLER | 16 | South Lincs | 8:56.30 |
| 4 | 55 | Owen HATHWAY | 17 | Grantham | 8:51.30 |
| 5 | 54 | Alfie BISBY | 16 | South Lincs | 8:52.60 |
| 6 | 52 | Oscar GOLDSMITH | 15 | South Lincs | 9:01.21 |
| 7 | 50 | Alexandra BULAT | 17 | Lincoln Vulc | 9:15.60 |
| 8 | 48 | Mollie BRIGGS | 18 | South Lincs | 9:29.80 |