EVENT 111 Men 12/14 Yrs 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Owain Roberts | 12 | Team Luton | 5:49.70 |
| 2 | 3 | Olly Fenwick | 12 | Verulam | 5:42.97 |
| 3 | 5 | Oscar Hunter | 12 | Norwich Swan | 5:39.50 |
| 4 | 7 | Daniel Andrews | 12 | Halstead | 5:35.40 |
| 5 | 6 | Ethan Thorpe | 12 | Basildon Ph | 5:38.50 |
| 6 | 4 | Harry Bird | 12 | Putteridge | 5:40.20 |
| 7 | 2 | Aidan Scott | 12 | St Felix Sch | 5:44.86 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Will Riley | 12 | teamipswich | 5:29.19 |
| 2 | 11 | Csanad Rehus | 12 | Co Peterboro | 5:25.21 |
| 3 | 13 | Toby Lashmar | 12 | Basildon Ph | 5:18.90 |
| 4 | 15 | Oscar Winterburn | 13 | teamipswich | 5:14.69 |
| 5 | 14 | Jude Gunner | 12 | St Felix Sch | 5:14.87 |
| 6 | 12 | Jamie Wilson | 12 | Wisbech | 5:22.41 |
| 7 | 10 | Harry Alexander | 13 | teamipswich | 5:25.72 |
| 8 | 8 | Zak Fellows | 12 | Cheshunt | 5:29.94 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Albert Orley | 13 | Braintree | 5:11.00 |
| 2 | 19 | Louis Allen | 13 | Basildon Ph | 5:08.00 |
| 3 | 21 | Robert Fenner | 13 | Basildon Ph | 4:57.83 |
| 4 | 23 | Thomas Spelman | 14 | Stowmarket | 4:56.57 |
| 5 | 22 | Harrison Shaw | 14 | Flitwick | 4:57.30 |
| 6 | 20 | George Prince | 13 | Hatfield | 5:07.29 |
| 7 | 18 | Jamie Comitti | 12 | Basildon Ph | 5:10.00 |
| 8 | 16 | Ben Every | 13 | St Felix Sch | 5:14.38 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 25 | Alex Harrop | 13 | teamipswich | 4:56.37 |
| 2 | 27 | James Gourpinar | 14 | Harlow Pen | 4:55.20 |
| 3 | 29 | Reuben Alty | 13 | teamipswich | 4:55.01 |
| 4 | 31 | Edward Ormsby | 14 | Co Cambridge | 4:54.10 |
| 5 | 30 | Milo Milton | 14 | Co Norwich | 4:54.80 |
| 6 | 28 | Joe Power | 14 | Basildon Ph | 4:55.07 |
| 7 | 26 | Lucas Hartley | 14 | Hatfield | 4:56.00 |
| 8 | 24 | Kevin Moldovan | 14 | Harlow Pen | 4:56.57 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 33 | Patch Robinson | 14 | teamipswich | 4:53.09 |
| 2 | 35 | Isaac Farrugia | 14 | Basildon Ph | 4:50.00 |
| 3 | 37 | Zak Troman | 14 | Colchester | 4:43.72 |
| 4 | 39 | Ryan Wall | 14 | Co Cambridge | 4:35.30 |
| 5 | 38 | Ben Howlett | 14 | teamipswich | 4:43.59 |
| 6 | 36 | Sandijs Cecins | 14 | Colchester | 4:48.90 |
| 7 | 34 | James Williamson | 14 | Co Cambridge | 4:52.65 |
| 8 | 32 | Massimo Girolami | 13 | Colchester | 4:53.70 |