EVENT 308 Mens Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 2 | 1 | Joseph Kingsland | 03 | Nova Cent'n | 5:02.50 |
| 3 | 3 | Luca Fankhauser | 02 | Guildford Ct | 5:01.02 |
| 4 | 5 | Luke Skelding | 02 | Co Birm'ham | 5:00.56 |
| 5 | 4 | Pierce Greening | 03 | Cockermouth | 5:00.82 |
| 6 | 2 | Ryan Wilcox | 02 | Nova Cent'n | 5:02.27 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 7 | Kieran Dale | 02 | Thanet Swim | 4:59.73 |
| 1 | 9 | Lewis Binning | 03 | Romford Town | 4:58.65 |
| 2 | 11 | Liam Brennan | 02 | Romford Town | 4:57.73 |
| 3 | 13 | Joe Basdeo-Taylor | 02 | KingstonHull | 4:57.30 |
| 4 | 15 | Huw Williams | 02 | Millfield | 4:55.32 |
| 5 | 14 | Ben Cope | 01 | Royal Wolv | 4:55.42 |
| 6 | 12 | Jacob Davies | 02 | Chase | 4:57.53 |
| 7 | 10 | Lewis Moore | 02 | Deben | 4:58.40 |
| 8 | 8 | Edward Mildred | 03 | Northampton | 4:59.37 |
| 9 | 6 | Oliver Watson | 02 | Co Birm'ham | 4:59.99 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 17 | Oscar Brain | 01 | Plymouth Lea | 4:55.02 |
| 1 | 19 | Theo Savva | 02 | Co Cardiff | 4:52.49 |
| 2 | 21 | Liam Birrell | 01 | Co Leeds | 4:52.16 |
| 3 | 23 | Charles Rayner | 01 | Hatfield | 4:51.94 |
| 4 | 25 | Leo Karski | 01 | Boldmere | 4:51.27 |
| 5 | 24 | Joel Lange | 01 | Maidenhead | 4:51.72 |
| 6 | 22 | Harvey Norman | 01 | Co Peterboro | 4:52.16 |
| 7 | 20 | Joel Sinclair | 02 | Carlisle Aq | 4:52.42 |
| 8 | 18 | James Newman | 02 | Co Leicester | 4:52.52 |
| 9 | 16 | Joseph Russell | 02 | Co Cant'bury | 4:55.16 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 27 | Joel Weston | 00 | Co Leicester | 4:50.37 |
| 1 | 29 | Christy Moon | 00 | Chelsea&West | 4:49.81 |
| 2 | 31 | Andrew Macintosh | 01 | SLanarkshire | 4:49.32 |
| 3 | 33 | Greig Rowe | 01 | Carnegie | 4:49.09 |
| 4 | 35 | Nathan Corrigan | 00 | TigersJersey | 4:48.89 |
| 5 | 34 | Myles Turner | 00 | West Suffolk | 4:49.03 |
| 6 | 32 | Daniel Ferguson | 01 | West Lothian | 4:49.12 |
| 7 | 30 | Henry Dixon | 00 | Aquae Sulis | 4:49.52 |
| 8 | 28 | William Hawkes | 01 | Grantham | 4:50.14 |
| 9 | 26 | Simon Kliment | 01 | Donc Dartes | 4:51.19 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 37 | Thomas Balfour | 00 | Bellshill | 4:48.61 |
| 1 | 39 | Alfie Kelly | 01 | Newcastle | 4:48.41 |
| 2 | 41 | Joshua Harris | 01 | Nova Cent'n | 4:48.00 |
| 3 | 43 | Alexander Boyd | 01 | Thanet Swim | 4:47.44 |
| 4 | 45 | Michael Rees | 00 | Sutton Cheam | 4:45.46 |
| 5 | 44 | Jack O'Brien | 00 | SwimTrafford | 4:45.54 |
| 6 | 42 | James Woodward | 00 | Potters Bar | 4:47.73 |
| 7 | 40 | Callum Smart | 00 | Co Oxford | 4:48.29 |
| 8 | 38 | William Hendry | 00 | Grimsby AST | 4:48.61 |
| 9 | 36 | Archie Plowman | 01 | Northampton | 4:48.88 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 47 | Myles Stirk | 00 | Co Leeds | 4:45.08 |
| 1 | 49 | Adam Wilson | 01 | Newcastle | 4:44.39 |
| 2 | 51 | Max Jameson | 00 | Thanet Swim | 4:43.22 |
| 3 | 53 | Marcus Dey | 01 | Co Salford | 4:43.09 |
| 4 | 55 | Archie Goodburn | 01 | Warrender Ba | 4:43.02 |
| 5 | 54 | Jakob Goodman | 00 | Millfield | 4:43.07 |
| 6 | 52 | Ben Harrison | 00 | Mt Kelly | 4:43.18 |
| 7 | 50 | Euan Cowan | 00 | Co Leeds | 4:43.32 |
| 8 | 48 | Jonathan Milner | 01 | Co Leeds | 4:44.54 |
| 9 | 46 | Fraser Allison | 00 | Warrender Ba | 4:45.46 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 57 | Charlie Hutchison | 02 | Ellesmere Co | 4:41.87 |
| 1 | 59 | Thomas Slater | 97 | Co Cant'bury | 4:40.65 |
| 2 | 61 | Max Murphy | 00 | Co Milton K | 4:40.05 |
| 3 | 63 | William Bell | 02 | Co Leicester | 4:39.00 |
| 4 | 65 | Kieran Wheatley | 99 | Co Leicester | 4:38.44 |
| 5 | 64 | Jordan Honour | 98 | Thanet Swim | 4:38.91 |
| 6 | 62 | Cameron Park | 97 | Co Glasgow | 4:40.05 |
| 7 | 60 | Nathan Wells | 98 | West Norfolk | 4:40.21 |
| 8 | 58 | Richard Mawson | 99 | Co Leeds | 4:40.80 |
| 9 | 56 | Alexander Seymour | 99 | Mt Kelly | 4:42.30 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 67 | George Clough | 99 | Warrender Ba | 4:37.71 |
| 1 | 69 | Luke Thomas | 97 | Wycombe Dist | 4:37.37 |
| 2 | 71 | Kieran Bird | 99 | Bicester | 4:37.12 |
| 3 | 73 | Matthew George | 00 | Co Salford | 4:36.92 |
| 4 | 75 | Ashley Hogg | 98 | Co Manch Aq | 4:36.84 |
| 5 | 74 | Joel Thompson | 01 | Shiverers | 4:36.90 |
| 6 | 72 | Tom Derbyshire | 98 | Royal Wolv | 4:37.01 |
| 7 | 70 | Joseph Miley | 97 | Garioch | 4:37.24 |
| 8 | 68 | Rubens King | 97 | Guildford Ct | 4:37.45 |
| 9 | 66 | Joel O'Halleron | 96 | Derwentside | 4:38.02 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 78 | Ryan Brown | 98 | Co Glasgow | 4:36.31 |
| 1 | 82 | Oliver Kincart | 98 | Portsmouth N | 4:35.30 |
| 2 | 86 | Thomas Dean | 00 | Maidenhead | 4:31.85 |
| 3 | 90 | Callum Lawrie | 98 | F.I.R.S.T. | 4:25.80 |
| 4 | 94 | Fraser Minnican | 95 | Loughboro Un | 4:23.10 |
| 5 | 92 | Brodie Williams | 99 | Millfield | 4:24.57 |
| 6 | 88 | Thomas Paine | 94 | Co Manch Aq | 4:31.62 |
| 7 | 84 | Zak Logue | 98 | Co Sund'land | 4:33.98 |
| 8 | 80 | Alastair Miley | 94 | Garioch | 4:36.05 |
| 9 | 76 | Luke Robins | 99 | Millfield | 4:36.66 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 79 | Ryan Retson | 00 | F.I.R.S.T. | 4:36.06 |
| 1 | 83 | Tony-Joe Trett Oliver | 99 | Mt Kelly | 4:35.13 |
| 2 | 87 | John Britton | 95 | Ealing | 4:31.66 |
| 3 | 91 | Jacob Greenow | 99 | TauntonDeane | 4:24.70 |
| 4 | 95 | Joe Litchfield | 98 | Donc Dartes | 4:22.51 |
| 5 | 93 | Nathan Hughes | 00 | Hatfield | 4:24.17 |
| 6 | 89 | Craig Munden | 97 | Loughboro Un | 4:30.13 |
| 7 | 85 | Ben Evans | 97 | Thanet Swim | 4:32.89 |
| 8 | 81 | Hayden Griffiths | 97 | Ellesmere Co | 4:35.98 |
| 9 | 77 | Thomas Millburn | 98 | Cockermouth | 4:36.46 |