EVENT 602 Mens Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Ewan Wilson | 13 | Co Salford | 4:42.96 |
| 1 | 4 | Ryan Wilcox | 13 | Nova Cent'n | 4:34.36 |
| 2 | 6 | Luke Skelding | 13 | Co Birm'ham | 4:38.15 |
| 3 | 8 | Ayotobi Laguda | 13 | Hatfield | 4:34.56 |
| 4 | 10 | Nathaniel Rodrigues | 13 | Sevenoaks | 4:37.56 |
| 5 | 9 | Luke Pullen | 13 | Havant & Wat | 4:33.51 |
| 6 | 7 | Joshua Cowham | 13 | Thanet Swim | 4:32.83 |
| 7 | 5 | Joseph Russell | 13 | Co Cant'bury | 4:33.38 |
| 8 | 3 | Matthew Fallon | 13 | Nova Cent'n | 4:43.29 |
| 9 | 1 | Huw Williams | 13 | Millfield | 4:35.86 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Kyo Tanner | 13 | Preston | 4:40.23 |
| 1 | 14 | Daniel Johnson | 13 | Royal Wolv | 4:32.03 |
| 2 | 16 | Finnian Trehane | 13 | Bourmth Coll | 4:33.48 |
| 3 | 18 | Joel Lange | 14 | Maidenhead | 4:31.37 |
| 4 | 20 | Timothy Leberl | 13 | Beckenham | 4:40.65 |
| 5 | 19 | Matthew Burton | 14 | Ealing | 4:38.58 |
| 6 | 17 | Christian Tai | 14 | Bourmth Coll | 4:42.79 |
| 7 | 15 | Thomas Watkin | 13 | Royal Wolv | 4:32.74 |
| 8 | 13 | Oliver Watson | 13 | Co Birm'ham | 4:32.62 |
| 9 | 11 | Edward Mildred | 12 | Northampton | 4:43.93 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 22 | William Chapman | 14 | Barnet Copt | 4:31.32 |
| 1 | 24 | Samuel Loizou | 14 | Bo Kirklees | 4:32.98 |
| 2 | 26 | Brett Davies | 14 | Northampton | 4:30.33 |
| 3 | 28 | William Woodward | 14 | Halton | 4:30.34 |
| 4 | 30 | James Cooper | 13 | Romford Town | 4:23.10 |
| 5 | 29 | Simon Kliment | 14 | Donc Dartes | 4:25.73 |
| 6 | 27 | Reese Housden | 13 | Hatfield | 4:29.64 |
| 7 | 25 | James Newman | 13 | Co Leicester | 4:27.85 |
| 8 | 23 | Bill Jones | 14 | Newcastle St | 4:28.47 |
| 9 | 21 | Daniel Jenkins | 14 | Co Oxford | 4:26.46 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 32 | William Hawkes | 14 | Grantham | 4:29.97 |
| 1 | 34 | Myles Turner | 15 | West Suffolk | 4:27.75 |
| 2 | 36 | Matthew Cross | 15 | Derventio | 4:23.85 |
| 3 | 38 | James Watson | 15 | Swindon Dolp | 4:16.96 |
| 4 | 40 | Ellis Simpkin | 15 | Co Sheffield | 4:26.85 |
| 5 | 39 | Cathal Kearney | 14 | Leinster IRL | 4:23.82 |
| 6 | 37 | Henry Willis | 15 | Tynemouth | 4:21.69 |
| 7 | 35 | Harry Middleton | 15 | Plymouth Lea | 4:25.15 |
| 8 | 33 | Charlie Boden | 14 | Plymouth Lea | 4:24.29 |
| 9 | 31 | Shay Bradley | 14 | Co Derby | 4:27.75 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 42 | Ewan Springett | 15 | Co Oxford | 4:19.00 |
| 1 | 44 | James Woodward | 15 | Potters Bar | 4:20.13 |
| 2 | 46 | Samuel Dyer | 15 | Northampton | 4:20.42 |
| 3 | 48 | Harry Stacey | 15 | Brighton | 4:21.25 |
| 4 | 50 | Luke Elliott | 16 | South Lincs | 4:18.09 |
| 5 | 49 | Kane Murcott | 15 | Wolv'hampton | 4:17.45 |
| 6 | 47 | Tom Ryan | 15 | Co Leicester | 4:26.06 |
| 7 | 45 | Dominic Johnson | 15 | Portsmouth N | 4:20.25 |
| 8 | 43 | Alex Crossland-Robins | 15 | Stockport Mo | 4:24.23 |
| 9 | 41 | Matthew Collins | 15 | S Bournem'th | 4:22.50 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 52 | Ciann O'Keeffe-Tighe | 15 | Leinster IRL | 4:17.96 |
| 1 | 54 | Cadan McCarthy | 15 | Munster IRL | 4:23.29 |
| 2 | 56 | Jack Smith | 17 | Derventio | 4:10.47 |
| 3 | 58 | Charlie Waddingham | 17 | Co Coventry | 4:14.78 |
| 4 | 60 | Hugo Bellamy | 17 | Amersham | 4:12.98 |
| 5 | 59 | Conor Bennett | 17 | SwimTrafford | 4:16.07 |
| 6 | 57 | Matthew Wright | 17 | Team Luton | 4:21.17 |
| 7 | 55 | Alexander Bregazzi | 17 | Io Man | 4:10.99 |
| 8 | 53 | Samuel Goldrick | 17 | Stockport Mo | 4:20.46 |
| 9 | 51 | Oliver Houghton | 17 | Co Manch Aq | 4:15.63 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 63 | Nathan Bentley | 17 | Hatfield | 4:12.36 |
| 1 | 67 | Joel Allen | 18 | Co Leicester | 4:10.10 |
| 2 | 71 | James Corrigan | 19 | Portsmouth N | 4:17.12 |
| 3 | 75 | Joe Evans | 22 | Co Coventry | 4:10.51 |
| 4 | 79 | Reece Worth | 19 | Mt Kelly | 4:05.93 |
| 5 | 77 | Riaan Steyn | 19 | Guildford Ct | 4:07.25 |
| 6 | 73 | Braiden Hartles | 18 | Co Birm'ham | 4:18.05 |
| 7 | 69 | Daniel Powell | 18 | Co Peterboro | 4:13.07 |
| 8 | 65 | Rhys Cole | 19 | TauntonDeane | 4:11.27 |
| 9 | 61 | James Gillie | 17 | Dulwich Dolp | 4:11.60 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 64 | Daniel Wheeler | 19 | Newcastle | 4:13.37 |
| 1 | 68 | Zak Dawson | 19 | Derwentside | 4:18.20 |
| 2 | 72 | Thomas Millburn | 17 | Cockermouth | 4:12.76 |
| 3 | 76 | Craig Munden | 18 | Gloucester | 4:07.53 |
| 4 | 80 | Joshua Duggan | 19 | Hatfield | 4:07.13 |
| 5 | 78 | Jack Baister | 18 | Middlesboro | 4:14.13 |
| 6 | 74 | Thomas Nelson | 19 | Wirral Metro | 4:08.41 |
| 7 | 70 | Steven Wilson | 18 | Boldmere | 4:18.41 |
| 8 | 66 | Dominic Wooldridge | 20 | Exeter City | 4:09.94 |
| 9 | 62 | George Epsly | 17 | Basildon Ph | 4:08.56 |