EVENT 825 Open/Male 11/14 Yrs 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Tom Greening | 12 | Norwich Swan | 6:13.86 |
| 4 | 3 | David Hoara | 11 | Thurrock | 6:09.32 |
| 5 | 2 | Clark Meanti | 12 | Putteridge | 6:10.67 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Cody Brigden | 12 | Watford SC | 6:07.48 |
| 2 | 6 | Johnny McAuley | 12 | Huntingdon | 6:01.82 |
| 3 | 8 | Tobias Watson | 12 | Bo Southend | 6:01.70 |
| 4 | 10 | Oscar Muller | 12 | Wisbech | 6:00.30 |
| 5 | 9 | Leo Sims | 12 | Hatfield | 6:01.01 |
| 6 | 7 | George Sims | 12 | Hatfield | 6:01.74 |
| 7 | 5 | George Headford | 11 | Basildon Ph | 6:04.54 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Oscar Langston | 13 | Epping For't | 5:52.47 |
| 2 | 14 | Todd Leung | 13 | Hatfield | 5:51.01 |
| 3 | 16 | Noah Conroy | 13 | Bishop Stort | 5:49.96 |
| 4 | 18 | Benjamin Piscopo | 12 | Co Peterboro | 5:47.80 |
| 5 | 17 | Casper Whittaker | 13 | Biggleswade | 5:49.12 |
| 6 | 15 | Ruslan Shiraz | 13 | Epping For't | 5:50.30 |
| 7 | 13 | Aaron Rawnsley | 13 | Harpenden | 5:52.21 |
| 8 | 11 | Fletcher Waugh | 11 | Colchester | 5:53.30 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 20 | Riley Allen | 13 | Thurrock | 5:45.59 |
| 2 | 22 | Adam Zarhloul | 13 | Thurrock | 5:44.30 |
| 3 | 24 | Jude Wankowski | 12 | teamipswich | 5:44.08 |
| 4 | 26 | Hardy Shipton | 13 | Hatfield | 5:38.47 |
| 5 | 25 | Taras Boiko | 12 | Bishop Stort | 5:39.50 |
| 6 | 23 | Samuel Childs | 12 | Berkhamsted | 5:44.19 |
| 7 | 21 | Harry Clarke | 13 | West Norfolk | 5:44.90 |
| 8 | 19 | Jack Munday | 13 | teamipswich | 5:47.55 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 28 | Montgomery Brewster | 13 | Watford SC | 5:35.48 |
| 2 | 30 | Ashton Hunter | 13 | Co Peterboro | 5:31.13 |
| 3 | 32 | Noah Buchan | 14 | Co Norwich | 5:29.30 |
| 4 | 34 | Finley Burford | 13 | Basildon Ph | 5:25.20 |
| 5 | 33 | Alfie Larham | 13 | Co Peterboro | 5:26.36 |
| 6 | 31 | Lewis Borgognoni | 14 | Co Peterboro | 5:30.21 |
| 7 | 29 | Lewis Gardner | 11 | Basildon Ph | 5:31.68 |
| 8 | 27 | Jack Lees | 12 | Epping For't | 5:37.30 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 36 | Jacob Wild | 14 | Newmarket | 5:17.36 |
| 2 | 38 | Ivan Ijomoni | 14 | Thurrock | 5:12.20 |
| 3 | 40 | Janos Csepely | 14 | teamipswich | 5:11.20 |
| 4 | 42 | Zachary Piscopo | 14 | Co Peterboro | 5:09.70 |
| 5 | 41 | Kameron Baker | 14 | Co Peterboro | 5:10.10 |
| 6 | 39 | Ethan Knights | 14 | teamipswich | 5:12.04 |
| 7 | 37 | Xavier Zerban | 14 | Biggleswade | 5:13.20 |
| 8 | 35 | James Peters | 14 | Basildon Ph | 5:21.99 |