EVENT 421 Mens 400m IM - Heats
Not Competing : 14,22,26
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Mide OLAJIDE | 11 | Thurrock | 6:01.90 |
| 4 | 3 | Freddie LAWS | 12 | West Norfolk | 5:57.30 |
| 5 | 2 | Michael KLIMASZEWSKI | 11 | Hatfield | 6:00.09 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 5 | Ciaran RICHES | 12 | West Suffolk | 5:55.51 |
| 2 | 7 | Owen VAUGHAN | 12 | Chelmsford | 5:51.15 |
| 3 | 9 | Nicholas BOTHA | 13 | Bishop Stort | 5:45.02 |
| 4 | 11 | William PESTELL | 12 | Colchester | 5:43.88 |
| 5 | 10 | Ismail RAHIM | 13 | Berkhamsted | 5:44.56 |
| 6 | 8 | Cole SHEPARD | 12 | Basildon Ph | 5:46.13 |
| 7 | 6 | William TOZER | 12 | West Suffolk | 5:53.86 |
| 8 | 4 | Matthew NEWSON | 12 | Co Peterboro | 5:56.20 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 13 | Finn JEFFERY | 12 | St Felix Sch | 5:42.48 |
| 2 | 16 | Ayotobi LAGUDA | 13 | Hatfield | 5:35.34 |
| 3 | 18 | Mal STAFF | 13 | UEA Norwich | 5:33.25 |
| 4 | 20 | William HARPUR-DAVIES | 13 | West Suffolk | 5:30.58 |
| 5 | 19 | Herbie KINDER | 13 | Co Peterboro | 5:31.05 |
| 6 | 17 | Yannik WILSON | 13 | Harpenden | 5:33.73 |
| 7 | 15 | Samuel ROSE | 12 | UEA Norwich | 5:37.97 |
| 8 | 12 | Harry GRICE | 13 | UEA Norwich | 5:43.31 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 23 | Elliott DAY | 13 | teamipswich | 5:28.56 |
| 2 | 25 | Lewis MOORE | 13 | Deben | 5:27.90 |
| 3 | 28 | Joe WELCH | 14 | Co Peterboro | 5:26.50 |
| 4 | 30 | Sam PERKINS | 13 | teamipswich | 5:25.46 |
| 5 | 29 | Matthew PECK | 13 | Mid Beds | 5:25.70 |
| 6 | 27 | Azar AITMARRI | 14 | Thurrock | 5:26.51 |
| 7 | 24 | Lewis BAYLEY | 14 | Southend | 5:28.19 |
| 8 | 21 | Mason HUNNISETT | 13 | Basildon Ph | 5:30.24 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 32 | John TELENSKY | 14 | Harpenden | 5:23.37 |
| 2 | 34 | Samuel PERKS | 13 | Chelmsford | 5:22.97 |
| 3 | 36 | Callum WOLLASTON | 14 | Cheshunt | 5:22.18 |
| 4 | 38 | Harrison LEES | 14 | Watford SC | 5:20.78 |
| 5 | 37 | James CHENNELLS | 14 | Berkhamsted | 5:21.51 |
| 6 | 35 | Manfred BATTLE | 13 | Stowmarket | 5:22.21 |
| 7 | 33 | Timothy HUGHES | 13 | Hatfield | 5:23.00 |
| 8 | 31 | Charles WHYTE | 14 | West Suffolk | 5:23.67 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 40 | Lewis CUTTING | 14 | Thurrock | 5:18.48 |
| 2 | 42 | Cole JAMES | 14 | Hatfield | 5:09.90 |
| 3 | 44 | Jamie MCCAFFRAY | 14 | Modernians | 5:08.20 |
| 4 | 46 | Harvey NORMAN | 14 | Co Peterboro | 4:53.17 |
| 5 | 45 | Thomas CLARE | 14 | teamipswich | 4:57.04 |
| 6 | 43 | James MCFARLAND | 14 | Mid Beds | 5:08.88 |
| 7 | 41 | Samuel BRYAN | 14 | Basildon Ph | 5:16.70 |
| 8 | 39 | Tyler THOMAS | 13 | Chatteris | 5:20.77 |