EVENT 401 Mens Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 3 | 1 | Benjamin FOULSTON | 17 | S10 | Nova Cent'n | 4:20.40 |
| 4 | 3 | Kyo TANNER | 15 | | Ellesmere Co | 4:16.30 |
| 5 | 2 | Dominic BOOLS | 14 | | Nova Cent'n | 4:16.40 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 5 | Joey TIPPIN | 14 | | Co Leicester | 4:15.10 |
| 2 | 7 | Thomas WATKIN | 15 | | Royal Wolv | 4:13.60 |
| 3 | 9 | Daniel JOHNSON | 15 | | Royal Wolv | 4:12.50 |
| 4 | 11 | Jevon PENNY | 14 | | Northampton | 4:11.80 |
| 5 | 10 | Simon SCULLY | 18 | | Co Leicester | 4:12.16 |
| 6 | 8 | Jack PRICE | 15 | | Chesterfield | 4:13.00 |
| 7 | 6 | Lewis WHITE | 17 | S9 | Co Derby | 4:13.80 |
| 8 | 4 | Joseph KINGSLAND | 14 | | Nova Cent'n | 4:16.20 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 13 | Casper RAYNARD | 15 | | Derventio | 4:11.60 |
| 2 | 15 | Matthew RICHMOND | 17 | | Northampton | 4:10.68 |
| 3 | 17 | George ALTON | 18 | | Chesterfield | 4:10.28 |
| 4 | 19 | Thomas BEAMER | 15 | | Co Leicester | 4:10.10 |
| 5 | 18 | Charlie PALMER | 16 | | Ilkeston | 4:10.20 |
| 6 | 16 | Ryan WILCOX | 15 | | Nova Cent'n | 4:10.60 |
| 7 | 14 | Jackson O'ROURKE | 15 | | Northampton | 4:11.30 |
| 8 | 12 | Matthew SMITH | 15 | | Northampton | 4:11.80 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 21 | Dara CLARKE | 15 | | Co Lincoln P | 4:09.40 |
| 2 | 23 | Adam METCALF | 16 | | Ellesmere Co | 4:08.14 |
| 3 | 25 | Ryan HUDDART | 16 | | Rykneld | 4:07.70 |
| 4 | 27 | Samuel NEELD | 17 | | Wrekin Coll | 4:07.10 |
| 5 | 26 | Samuel BLACKETT | 19 | | Northampton | 4:07.40 |
| 6 | 24 | Ben COPE | 16 | | Royal Wolv | 4:07.80 |
| 7 | 22 | Joshua HARRIS | 16 | | Nova Cent'n | 4:08.70 |
| 8 | 20 | Michael MCLENNAN | 19 | | Nova Cent'n | 4:09.73 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 30 | Joel WESTON | 17 | | Co Leicester | 4:04.50 |
| 2 | 34 | Joel THOMPSON | 16 | | Ellesmere Co | 3:58.80 |
| 3 | 38 | Archie PLOWMAN | 16 | | Northampton | 3:57.90 |
| 4 | 42 | Craig MUNDEN | 20 | | Loughboro Un | 3:55.02 |
| 5 | 40 | Ross HILL | 20 | | Loughboro Un | 3:57.10 |
| 6 | 36 | Liam SNOOK | 19 | | Northampton | 3:58.10 |
| 7 | 32 | Kane MURCOTT | 17 | | Royal Wolv | 4:03.40 |
| 8 | 28 | George BARBER | 16 | | Royal Wolv | 4:06.60 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 31 | Hector PARDOE | 16 | | Ellesmere Co | 4:03.90 |
| 2 | 35 | William PETTIT | 16 | | Ellesmere Co | 3:58.60 |
| 3 | 39 | Charlie HUTCHISON | 15 | | Ellesmere Co | 3:57.60 |
| 4 | 43 | Ryan READER | 19 | | Derventio | 3:54.70 |
| 5 | 41 | William FOSTER | 17 | | Co Derby | 3:55.19 |
| 6 | 37 | Charlie POOLE | 16 | | Co Leicester | 3:58.00 |
| 7 | 33 | Edward MILDRED | 14 | | Northampton | 4:01.60 |
| 8 | 29 | Jack BUSWELL | 16 | | Northampton | 4:06.50 |