EVENT 408 Men 17 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 2 | Michael Young | 04 | Guildford Ct | 4:48.80 |
| 1 | 4 | Alex Keeble | 04 | Leic Sharks | 4:48.35 |
| 2 | 6 | Charles Hazell | 04 | Mt Kelly | 4:47.22 |
| 3 | 8 | Oliver Jones | 05 | Poole | 4:46.83 |
| 4 | 10 | Christian Duetoft | 05 | Guildford Ct | 4:46.77 |
| 5 | 9 | Alexander Williams | 05 | Ealing | 4:46.78 |
| 6 | 7 | Mark Milburn | 05 | Colchester | 4:46.84 |
| 7 | 5 | Jack Senior | 04 | Co Leeds | 4:47.69 |
| 8 | 3 | Alex Austin | 04 | Hillingdon | 4:48.57 |
| 9 | 1 | Jacob Elwell | 04 | N & D PP SC | 4:49.43 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 12 | Elliot Sibley | 05 | Nova Cent'n | 4:45.88 |
| 1 | 14 | James Froggatt | 05 | Co Birm'ham | 4:44.81 |
| 2 | 16 | Riccardo Lucarelli | 05 | Mt Kelly | 4:44.19 |
| 3 | 18 | Harry Hewitt | 05 | Millfield | 4:43.32 |
| 4 | 20 | Patrick Braddock | 04 | Oldham Aqua | 4:43.01 |
| 5 | 19 | Luke Clegg | 05 | Bo Kirklees | 4:43.09 |
| 6 | 17 | Luca Arioli | 05 | Mt Kelly | 4:43.68 |
| 7 | 15 | Lawrence Elliott | 05 | Seagulls SC | 4:44.53 |
| 8 | 13 | Harvey Quiddington | 04 | Barnet Copt | 4:45.13 |
| 9 | 11 | Joe Stratton | 04 | Royal Wolv | 4:46.30 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 22 | Andrew Jones | 04 | Royal Wolv | 4:41.71 |
| 1 | 24 | Donatas Dragasius | 04 | Mt Kelly | 4:40.91 |
| 2 | 26 | Oliver Pope | 05 | Thanet Swim | 4:40.13 |
| 3 | 28 | James Shevchenko | 05 | Royal Wolv | 4:39.66 |
| 4 | 30 | Robert Burgess | 05 | Co Glasgow | 4:39.39 |
| 5 | 29 | Jamie Ferguson | 03 | Aberdeen Per | 4:39.53 |
| 6 | 27 | Sam Williamson | 04 | Mt Kelly | 4:39.87 |
| 7 | 25 | Rhydian Arch | 05 | Co Cardiff | 4:40.72 |
| 8 | 23 | Simon Robson | 04 | York City | 4:41.32 |
| 9 | 21 | Thomas Deffains | 04 | Mt Kelly | 4:42.43 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 32 | Jan Poulton | 04 | Wycombe Dist | 4:37.56 |
| 1 | 34 | Donald Bisset | 01 | UniOfStirl | 4:36.86 |
| 2 | 36 | B Howarth-Osborne | 04 | Co Sheffield | 4:36.53 |
| 3 | 38 | Thomas White | 02 | Nova Cent'n | 4:36.08 |
| 4 | 40 | Moritz Baumgartner | 05 | Mt Kelly | 4:35.21 |
| 5 | 39 | Reece Grady | 05 | Stockport Mo | 4:35.96 |
| 6 | 37 | Rico Bringeman | 05 | South Lincs | 4:36.41 |
| 7 | 35 | Myles Turner | 00 | West Suffolk | 4:36.63 |
| 8 | 33 | Charlie Broome | 04 | Co Leeds | 4:37.21 |
| 9 | 31 | Tom Robinson | 00 | Aberdeen Per | 4:37.58 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 43 | Luke Ibbeson | 03 | Loughboro Un | 4:34.77 |
| 1 | 47 | Joe Cooper | 04 | teamipswich | 4:33.67 |
| 2 | 51 | Charles Kershaw | 02 | Loughboro Un | 4:30.01 |
| 3 | 55 | Tony Joe Trett Oliver | 99 | UniOfStirl | 4:27.62 |
| 4 | 59 | Charlie Hutchison | 02 | Loughboro Un | 4:24.50 |
| 5 | 57 | Angus Allison | 03 | UniOfStirl | 4:25.90 |
| 6 | 53 | Oscar Barlow | 05 | Bath Univ | 4:29.45 |
| 7 | 49 | Wyatt Walsh | 03 | Millfield | 4:30.53 |
| 8 | 45 | Joshua Press | 03 | Co Milton K | 4:34.59 |
| 9 | 41 | Nathan Wells | 98 | West Norfolk | 4:35.16 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 44 | Jay Manners | 99 | N & D PP SC | 4:34.62 |
| 1 | 48 | Joshua Vance | 03 | Northampton | 4:33.57 |
| 2 | 52 | Pierce Greening | 03 | UniOfStirl | 4:29.82 |
| 3 | 56 | R Rowbotham-Keating | 05 | Co Manch Aq | 4:26.75 |
| 4 | 60 | Kaden Edwards | 04 | Co Cardiff | 4:22.83 |
| 5 | 58 | Ben Harrison | 00 | Loughboro Un | 4:25.12 |
| 6 | 54 | Joel Thompson | 01 | Shiverers | 4:28.70 |
| 7 | 50 | Jackson O'Rourke | 02 | Northampton | 4:30.02 |
| 8 | 46 | Vadim Bosc | 05 | Co Liverpool | 4:34.14 |
| 9 | 42 | Elijah Kendrick | 04 | Plymouth Lea | 4:35.10 |