EVENT 401 Mens Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 3 | 1 | Joshua Fairchild | 20 | S14 | Co Coventry | 4:59.02 |
| 4 | 3 | William Gearey | 15 | | Worcester | 4:16.59 |
| 5 | 2 | Oliver Carless | 14 | | Boldmere | 4:18.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 2 | 5 | Deen Ahmed | 14 | | Solihull | 4:14.30 |
| 3 | 7 | Kieran Bott | 15 | | Co Leicester | 4:12.85 |
| 4 | 9 | Oliver Duckworth | 16 | | Royal Wolv | 4:12.30 |
| 5 | 8 | Joey Tippin | 15 | | Co Leicester | 4:12.79 |
| 6 | 6 | Dominic Bools | 15 | | Radford | 4:14.10 |
| 7 | 4 | Andrew Hall | 15 | | Nova Cent'n | 4:15.10 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 11 | Thomas Davidson | 16 | | Wolv'hampton | 4:11.80 |
| 2 | 13 | Ryan Wilcox | 16 | | Nova Cent'n | 4:11.40 |
| 3 | 15 | Matthew Richmond | 18 | | Northampton | 4:10.10 |
| 4 | 17 | Casper Raynard | 16 | | Derventio | 4:09.30 |
| 5 | 16 | Joshua Skinner | 15 | | Nova Cent'n | 4:09.70 |
| 6 | 14 | Aron Preece | 19 | | Nova Cent'n | 4:11.02 |
| 7 | 12 | Michael McLennan | 20 | | Nova Cent'n | 4:11.60 |
| 8 | 10 | Thomas Wyatt | 16 | | Long Eaton | 4:11.90 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 19 | Joseph Sadler | 15 | | Nova Cent'n | 4:09.24 |
| 2 | 21 | Joseph Kingsland | 15 | | Nova Cent'n | 4:07.10 |
| 3 | 23 | Louis Fenson | 16 | | Co Coventry | 4:06.60 |
| 4 | 25 | Kane Murcott | 18 | | Royal Wolv | 4:04.80 |
| 5 | 24 | Jevon Penny | 15 | | Northampton | 4:06.10 |
| 6 | 22 | Joel Weston | 18 | | Co Leicester | 4:06.60 |
| 7 | 20 | Finn Nicholl | 16 | | Royal Wolv | 4:07.60 |
| 8 | 18 | Jack Gartside | 15 | | Northampton | 4:09.30 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 28 | Shay Bradley | 17 | | Co Derby | 4:03.80 |
| 2 | 32 | Daniel Johnson | 16 | | Royal Wolv | 3:59.30 |
| 3 | 36 | Thomas Beamer | 16 | | Co Leicester | 3:58.40 |
| 4 | 40 | Ryan Reader | 20 | | Derventio | 3:54.10 |
| 5 | 38 | Charlie Poole | 17 | | Co Leicester | 3:56.80 |
| 6 | 34 | William Slawson | 21 | | Wrekin Coll | 3:58.50 |
| 7 | 30 | Ryan Huddart | 17 | | Derventio | 4:02.30 |
| 8 | 26 | Jacob Whittle | 14 | | Derventio | 4:04.70 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 29 | Samuel Blackett | 20 | | Northampton | 4:02.60 |
| 2 | 33 | Jack Buswell | 17 | | Northampton | 3:59.20 |
| 3 | 37 | Edward Mildred | 15 | | Northampton | 3:57.80 |
| 4 | 41 | William Bell | 16 | | Co Leicester | 3:49.90 |
| 5 | 39 | Archie Plowman | 17 | | Northampton | 3:56.70 |
| 6 | 35 | George Barber | 17 | | Royal Wolv | 3:58.40 |
| 7 | 31 | Ben Cope | 17 | | Royal Wolv | 3:59.50 |
| 8 | 27 | Jackson O'Rourke | 16 | | Northampton | 4:04.30 |