EVENT 306 Men's 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 2 | Myles Turner | 00 | West Suffolk | 4:40.80 |
| 1 | 4 | Andrew Jones | 04 | Royal Wolv | 4:38.73 |
| 2 | 6 | Thomas Deffains | 04 | Bath Univ | 4:38.23 |
| 3 | 8 | Daniel Ransom | 08 | Co Leeds | 4:37.14 |
| 4 | 10 | Fergus Thomson | 07 | Mt Kelly | 4:36.62 |
| 5 | 9 | Donatas Dragasius | 04 | Co Manch Aq | 4:37.12 |
| 6 | 7 | Finlay Davies | 06 | Midlothian | 4:37.99 |
| 7 | 5 | Oliver Jones | 05 | Poole | 4:38.47 |
| 8 | 3 | Joseph Ashley | 08 | Co Liverpool | 4:39.27 |
| 9 | 1 | Ewan Wilson | 02 | Co Sheffield | 4:40.85 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 12 | James Froggatt | 05 | Co Birm'ham | 4:36.02 |
| 1 | 14 | Luke Clegg | 05 | Swansea Uni | 4:35.78 |
| 2 | 16 | Luke Poulton | 06 | Wycombe Dist | 4:34.91 |
| 3 | 18 | Adam Wilson | 03 | Lboro Uni | 4:33.68 |
| 4 | 20 | Filip Nowacki | 07 | TigersJersey | 4:33.23 |
| 5 | 19 | Charles Kershaw | 02 | Lboro Uni | 4:33.49 |
| 6 | 17 | Donald Bisset | 01 | UniOfStirl | 4:34.63 |
| 7 | 15 | Sam Williamson | 04 | Bath Univ | 4:35.62 |
| 8 | 13 | Toby Godsell | 07 | Millfield | 4:35.85 |
| 9 | 11 | Patrick Braddock | 04 | Swansea Uni | 4:36.58 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 22 | Joseph Buxton | 03 | Reading | 4:32.73 |
| 1 | 24 | Llewellyn Porter | 08 | Camden Swiss | 4:32.23 |
| 2 | 26 | Elijah Kendrick | 04 | Swansea Uni | 4:32.16 |
| 3 | 28 | Rhydian Arch | 05 | Co Cardiff | 4:31.61 |
| 4 | 30 | Jay Manners | 99 | N & D PP SC | 4:30.83 |
| 5 | 29 | Oliver Pope | 05 | Thanet Swim | 4:31.39 |
| 6 | 27 | Daniel Jackson | 06 | Bo Kirklees | 4:31.73 |
| 7 | 25 | James Shevchenko | 05 | Royal Wolv | 4:32.19 |
| 8 | 23 | Cameron Wrapson | 06 | Co Birm'ham | 4:32.56 |
| 9 | 21 | Hubert Gdaniec | 04 | Mt Kelly | 4:32.97 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 33 | John Britton | 95 | Ealing | 4:30.37 |
| 1 | 37 | Isaac Dodds | 04 | Bath Univ | 4:26.66 |
| 2 | 41 | David Annis | 06 | Royal Wolv | 4:24.71 |
| 3 | 45 | Tony Joe Trett Oliver | 99 | UniOfStirl | 4:23.84 |
| 4 | 49 | Charlie Hutchison | 02 | L'borogh PC | 4:17.87 |
| 5 | 47 | Ben Harrison | 00 | Lboro Uni | 4:22.88 |
| 6 | 43 | Edward Marcal Whittles | 06 | Chelsea&West | 4:24.18 |
| 7 | 39 | Vadim Bosc | 05 | Mt Kelly | 4:25.39 |
| 8 | 35 | Oscar Barlow | 05 | Swansea Uni | 4:28.94 |
| 9 | 31 | Kourosh Khodakhah | 07 | Co Leeds | 4:30.59 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 34 | R Rowbotham-Keating | 05 | Lboro Uni | 4:30.36 |
| 1 | 38 | Evan Davidson | 07 | Perth City | 4:25.68 |
| 2 | 42 | Pierce Greening | 03 | UniOfStirl | 4:24.68 |
| 3 | 46 | Angus Allison | 03 | UniOfStirl | 4:23.26 |
| 4 | 50 | Max Litchfield | 95 | L'borogh PC | 4:10.40 |
| 5 | 48 | William Ryley | 98 | Co Cardiff | 4:19.11 |
| 6 | 44 | George Smith | 04 | UniOfStirl | 4:24.00 |
| 7 | 40 | Andrew Bertoli | 04 | UniOfStirl | 4:25.24 |
| 8 | 36 | Tom Robinson | 00 | UoAPS | 4:28.78 |
| 9 | 32 | Oscar Dodds | 06 | Leic Sharks | 4:30.57 |