EVENT 121 Mens 400m IM - Heats
Not Competing : 16,23,29,33
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Bayley FINBOW | 15 | teamipswich | 5:11.78 |
| 4 | 3 | Benjamin GARTON | 15 | Co Peterboro | 5:11.35 |
| 5 | 2 | Callum DAVIS | 15 | Bishop Stort | 5:11.70 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 5 | Levin GRAF | 15 | Co Cambridge | 5:09.61 |
| 2 | 7 | Max WILSON | 15 | Modernians | 5:03.90 |
| 3 | 9 | Harry EADE | 15 | teamipswich | 5:00.20 |
| 4 | 11 | Harry LONGBOTTOM | 15 | Deben | 4:59.02 |
| 5 | 10 | Finlay RYAN | 16 | Norwich Swan | 4:59.24 |
| 6 | 8 | Harry WHITEMAN | 15 | Co Peterboro | 5:03.20 |
| 7 | 6 | Michael LARDNER | 16 | Co Peterboro | 5:05.10 |
| 8 | 4 | James MONCUR-BROWN | 15 | UEA Norwich | 5:11.09 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 13 | Patrick KEAVENEY | 15 | Modernians | 4:57.60 |
| 2 | 15 | Zack CAMPBELL-MAUGHAN | 16 | West Norfolk | 4:55.26 |
| 3 | 18 | Harry NICHOLLS | 15 | Basildon Ph | 4:53.56 |
| 4 | 20 | Thomas WIGGINS | 16 | Co Peterboro | 4:52.34 |
| 5 | 19 | Spencer PRIOR | 16 | Colchester | 4:53.16 |
| 6 | 17 | Samuel PECK | 15 | UEA Norwich | 4:54.58 |
| 7 | 14 | Myles TURNER | 15 | West Suffolk | 4:56.32 |
| 8 | 12 | Ryan JARVIS | 16 | Team Luton | 4:58.41 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 22 | Calvin COE | 17 | Stowmarket | 4:51.30 |
| 2 | 25 | Ole MILLS | 16 | Braintree | 4:48.05 |
| 3 | 27 | Ben HARRISON | 15 | Potters Bar | 4:47.30 |
| 4 | 30 | Cameron MCRAE | 16 | Co Peterboro | 4:43.92 |
| 5 | 28 | Jack PICKERING | 17 | teamipswich | 4:47.25 |
| 6 | 26 | James WOODWARD | 15 | Potters Bar | 4:47.50 |
| 7 | 24 | Graeham DOUGLAS | 27 | Co Cambridge | 4:50.86 |
| 8 | 21 | Ryan KELLY | 16 | Chelmsford | 4:52.33 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 32 | Jakob GOODMAN | 15 | St Felix Sch | 4:40.93 |
| 2 | 35 | Augustus VEASEY | 19 | Chelmsford | 4:33.86 |
| 3 | 37 | Nathan WELLS | 17 | West Norfolk | 4:32.91 |
| 4 | 39 | Nathan HUGHES | 15 | Hatfield | 4:27.80 |
| 5 | 38 | Thomas MCLAGAN | 19 | Chelmsford | 4:28.32 |
| 6 | 36 | Joshua GRAVES | 18 | Co Peterboro | 4:33.77 |
| 7 | 34 | Thomas SARAH | 21 | Co Cambridge | 4:37.24 |
| 8 | 31 | Fraser SCOTT | 17 | Basildon Ph | 4:43.18 |