EVENT 103 Boys Open 400m IM - Heats
Not Competing : 48
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Aaron LAMBIE | 10 | Thurrock | 6:26.96 |
| 4 | 3 | Owen VAUGHAN | 10 | Chelmsford | 6:16.28 |
| 5 | 2 | Jack CONROY | 10 | Thurrock | 6:23.12 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 5 | Noah TOWNLEY | 11 | Bo Southend | 5:51.06 |
| 3 | 7 | Jack RICHES | 12 | UEA Norwich | 5:44.70 |
| 4 | 9 | Joseph RICHARDSON | 12 | Harpenden | 5:42.70 |
| 5 | 8 | Silvester HAVRILLAY | 11 | Harlow Pen | 5:42.79 |
| 6 | 6 | Mason HUNNISETT | 11 | Basildon Ph | 5:47.39 |
| 7 | 4 | Naythan AUNG | 10 | Colchester | 6:03.07 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 11 | Jamie MCCAFFRAY | 12 | Modernians | 5:42.35 |
| 2 | 13 | Mal STAFF | 12 | UEA Norwich | 5:41.52 |
| 3 | 15 | Tyler THOMAS | 12 | Chatteris | 5:41.29 |
| 4 | 17 | Timothy HUGHES | 12 | Hatfield | 5:39.34 |
| 5 | 16 | Matthew PECK | 12 | Biggleswade | 5:40.80 |
| 6 | 14 | James CHENNELLS | 12 | Tring | 5:41.49 |
| 7 | 12 | Lewis MOORE | 12 | Deben | 5:41.99 |
| 8 | 10 | Manfred BATTLE | 12 | Stowmarket | 5:42.61 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 19 | Cole JAMES | 12 | Hatfield | 5:33.18 |
| 2 | 21 | Samuel PERKS | 11 | Chelmsford | 5:30.44 |
| 3 | 23 | Reese HOUSDEN | 12 | Hatfield | 5:23.60 |
| 4 | 25 | Sebastian DI SIENA | 13 | Co Peterboro | 5:22.09 |
| 5 | 24 | Nathan SWIFT | 12 | Team Luton | 5:22.46 |
| 6 | 22 | Mason BRAND | 12 | Berkhamsted | 5:26.77 |
| 7 | 20 | Charles WHYTE | 12 | West Suffolk | 5:32.64 |
| 8 | 18 | Thomas CLARE | 12 | teamipswich | 5:39.18 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 27 | Morgan NEWMAN | 13 | Potters Bar | 5:19.91 |
| 2 | 29 | Harry LONGBOTTOM | 13 | Deben | 5:19.33 |
| 3 | 31 | Harry WHITEMAN | 13 | Co Peterboro | 5:12.02 |
| 4 | 33 | Luke SUGDEN | 14 | Hatfield | 5:10.32 |
| 5 | 32 | James WOODWARD | 14 | Potters Bar | 5:10.66 |
| 6 | 30 | Nicholas PERKINS | 13 | UEA Norwich | 5:17.67 |
| 7 | 28 | Jack RYAN | 13 | Team Luton | 5:19.91 |
| 8 | 26 | Charles RAYNER | 13 | Hemel Hemp | 5:21.50 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 35 | Benjamin GARRATT | 14 | Hatfield | 5:09.85 |
| 2 | 37 | Samuel COTTEE | 14 | teamipswich | 5:07.62 |
| 3 | 39 | Louis SPONG | 14 | DunmowAtlant | 5:03.99 |
| 4 | 41 | Samuel PECK | 13 | UEA Norwich | 5:02.10 |
| 5 | 40 | Michael LARDNER | 14 | Co Peterboro | 5:03.02 |
| 6 | 38 | Harry EADE | 13 | teamipswich | 5:06.50 |
| 7 | 36 | Harry CONSTANTINE | 13 | Dunstable | 5:08.88 |
| 8 | 34 | Harvey NORMAN | 12 | Co Peterboro | 5:10.00 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 43 | Myles TURNER | 14 | West Suffolk | 5:00.23 |
| 2 | 45 | Patrick KEAVENEY | 14 | Modernians | 4:56.50 |
| 3 | 47 | Charlie BODEN | 13 | Chelmsford | 4:55.88 |
| 4 | 50 | Nathan HUGHES | 13 | Hatfield | 4:40.13 |
| 5 | 49 | Jamie SCHOLES | 14 | Co Peterboro | 4:48.02 |
| 6 | 46 | Cameron MCRAE | 14 | Co Peterboro | 4:56.47 |
| 7 | 44 | Ben HARRISON | 13 | Potters Bar | 4:57.70 |
| 8 | 42 | Harry NICHOLLS | 13 | Basildon Ph | 5:01.23 |