EVENT 601 Mens Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 2 | Aidan PILCHER | 14 | teamipswich | 5:08.60 |
| 3 | 4 | Matthew VAUGHAN | 15 | Beccles Town | 5:07.87 |
| 4 | 6 | Daniel MONK | 15 | Harlow Pen | 5:07.70 |
| 5 | 5 | Connor WALKER | 15 | Co Peterboro | 5:07.71 |
| 6 | 3 | Matthew DEBENHAM | 15 | teamipswich | 5:08.33 |
| 7 | 1 | Joe FLETCHER | 17 | Stowmarket | 5:08.87 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 8 | Christopher WILLIAMSON | 14 | Co Cambridge | 5:06.92 |
| 2 | 10 | James ROTHWELL | 15 | Co Peterboro | 5:05.70 |
| 3 | 12 | William ROBINS | 16 | C Beds SS | 5:04.55 |
| 4 | 14 | James CLAY | 14 | West Suffolk | 5:00.00 |
| 5 | 13 | Connor HOUSTON | 15 | Deben | 5:01.46 |
| 6 | 11 | Zane BATT | 16 | Hoddesdon | 5:05.24 |
| 7 | 9 | Samuel DAY | 16 | Beccles Town | 5:06.31 |
| 8 | 7 | Zack TREHARNE | 15 | Co Peterboro | 5:07.50 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 16 | George WHITEMAN | 15 | Co Peterboro | 4:58.61 |
| 2 | 18 | Teal'K SMITH | 16 | Beccles Town | 4:55.77 |
| 3 | 20 | Mattias MORSE | 16 | Hemel Hemp | 4:50.61 |
| 4 | 22 | Jack TURRELL | 16 | Basildon Ph | 4:49.10 |
| 5 | 21 | Daniel ENGLISH | 17 | Bor of Brox | 4:49.35 |
| 6 | 19 | Joseph RICHARDSON | 18 | Co St Albans | 4:51.40 |
| 7 | 17 | Samuel BULLINGHAM | 16 | West Suffolk | 4:56.23 |
| 8 | 15 | Peter SOCZEWKA | 14 | Hatfield | 4:59.20 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 24 | Joe COOPER | 15 | teamipswich | 4:41.90 |
| 2 | 26 | Lewis BINNING | 16 | Basildon Ph | 4:32.60 |
| 3 | 28 | Myles TURNER | 19 | West Suffolk | 4:30.88 |
| 4 | 30 | Nathan HUGHES | 19 | Hatfield | 4:15.60 |
| 5 | 29 | Nathan WELLS | 21 | West Norfolk | 4:20.57 |
| 6 | 27 | Herbie KINDER | 17 | Co Peterboro | 4:32.60 |
| 7 | 25 | Henry PEARCE | 17 | Co Peterboro | 4:37.56 |
| 8 | 23 | Freddie LAWS | 16 | West Norfolk | 4:46.92 |