EVENT 101 Mixed 10 Yrs/Over 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Alfie GROUNSELL | 11 | Retford | 26:00.00 |
| 2 | 4 | Toby EDMONDSON | 10 | Grantham | 24:50.64 |
| 3 | 6 | Elliot GLEAVE | 11 | Grantham | 24:50.64 |
| 4 | 8 | Leo BARNETT | 12 | Grantham | 24:50.64 |
| 5 | 7 | Daisy CANTILLON | 12 | Grantham | 24:50.64 |
| 6 | 5 | Thomas HILLSON | 11 | Grantham | 24:50.64 |
| 7 | 3 | Laura LOVETT | 11 | Co Lincoln P | 25:00.00 |
| 8 | 1 | Abigail TOMLINSON | 11 | Corby | 26:00.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | George LEONARD | 12 | Grantham | 24:40.41 |
| 2 | 12 | Poppy HATHWAY | 13 | Grantham | 24:38.17 |
| 3 | 14 | Henry WILLERTON | 11 | Skegness | 24:00.00 |
| 4 | 16 | Lottie Ava FLATTERS | 12 | Deepings | 23:30.00 |
| 5 | 15 | Joshua KIM | 11 | Grantham | 23:32.19 |
| 6 | 13 | Lexie SHEWAN | 14 | Grantham | 24:27.27 |
| 7 | 11 | Fabian KOLASA | 13 | Grantham | 24:38.17 |
| 8 | 9 | Sophie OWEN | 12 | Lincoln Vulc | 24:50.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Lea HILAROWICZ | 16 | Co Lincoln P | 23:00.00 |
| 2 | 20 | Daniel PEARSON | 36 | Boston | 23:00.00 |
| 3 | 22 | Erin NORTON | 14 | Boston | 22:46.66 |
| 4 | 24 | Elisabeth KINNEAR | 14 | Grantham | 22:41.80 |
| 5 | 23 | Molly CRAUGHAN | 12 | Lincoln Vulc | 22:45.26 |
| 6 | 21 | Oliver JONES | 15 | Lincoln Vulc | 22:50.00 |
| 7 | 19 | Janna SCHUERCH | 14 | Co Lincoln P | 23:00.00 |
| 8 | 17 | Tristan EKE | 13 | Co Lincoln P | 23:00.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Isla-Rose WILDISH | 10 | Retford | 22:15.75 |
| 2 | 28 | Iris FRENCH | 14 | Lincoln Vulc | 22:03.98 |
| 3 | 30 | Emma ARTHUR | 16 | Co Lincoln P | 21:56.67 |
| 4 | 32 | Maisie ASMAN | 14 | Lincoln Vulc | 21:51.47 |
| 5 | 31 | Emily HUNT | 14 | Lincoln Vulc | 21:52.12 |
| 6 | 29 | Charlotte DIXON | 10 | Hitchin | 22:00.00 |
| 7 | 27 | Chelsea TODD | 14 | Lincoln Vulc | 22:07.63 |
| 8 | 25 | Peyton BRIGHT | 13 | Lincoln Vulc | 22:25.00 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 34 | Oliver CLARKE | 12 | Deepings | 21:30.00 |
| 2 | 36 | Annabelle JAY | 12 | Grantham | 21:02.66 |
| 3 | 38 | Remi-leigh BERRY | 11 | Co Lincoln P | 21:00.00 |
| 4 | 40 | Maddison HODGIN | 14 | Co Lincoln P | 21:00.00 |
| 5 | 39 | Freddie TRAGNI | 15 | Co Lincoln P | 21:00.00 |
| 6 | 37 | Ellena HOWITT | 13 | Grantham | 21:02.66 |
| 7 | 35 | Brooke HEMMINGS | 15 | Lincoln Vulc | 21:19.32 |
| 8 | 33 | Charlotte TURNER | 14 | Lincoln Vulc | 21:41.09 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 42 | Eleanor BIRINY | 13 | Lincoln Vulc | 20:55.00 |
| 2 | 44 | Isla SCOTT | 13 | Lincoln Vulc | 20:46.49 |
| 3 | 46 | Amy TAYLOR | 13 | Grantham | 20:34.05 |
| 4 | 48 | Sophie WARD | 15 | Grantham | 20:00.75 |
| 5 | 47 | Jessica - Rose DAVISON | 14 | Grantham | 20:13.22 |
| 6 | 45 | Harriet MCCORMACK | 14 | Grantham | 20:38.97 |
| 7 | 43 | Ella BLACKBOURN | 16 | Lincoln Vulc | 20:47.04 |
| 8 | 41 | Neya VERNON | 12 | Lincoln Vulc | 20:57.84 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 50 | Kieron TOMS | 14 | Deepings | 19:50.00 |
| 2 | 52 | Elena ALDENHOFF-KELLY | 15 | Grantham | 18:59.84 |
| 3 | 54 | Emily TALKES | 12 | Lincoln Vulc | 18:56.03 |
| 4 | 56 | Jack HICKS | 14 | Lincoln Vulc | 18:34.79 |
| 5 | 55 | Harry VICKERS | 16 | Lincoln Vulc | 18:55.87 |
| 6 | 53 | Ben CARLYLE | 14 | Grantham | 18:59.84 |
| 7 | 51 | James HUCKLE | 12 | Lincoln Vulc | 19:31.54 |
| 8 | 49 | Lucy WILLATTS | 12 | Grantham | 19:57.70 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 58 | Grace TURNER | 17 | Grantham | 18:26.29 |
| 2 | 60 | Hannah DODWELL | 30 | Co Lincoln P | 18:07.00 |
| 3 | 62 | Daniel DEGNAN | 16 | Grantham | 17:43.99 |
| 4 | 64 | Owen HATHWAY | 18 | Grantham | 16:54.90 |
| 5 | 63 | Joshua CLARKE | 16 | Grantham | 17:01.05 |
| 6 | 61 | Zach HOPKINSON | 15 | Grantham | 18:01.66 |
| 7 | 59 | Jacob BRIERS | 16 | Deepings | 18:22.38 |
| 8 | 57 | James CASH | 14 | Deepings | 18:34.39 |