EVENT 424 Men 13/16 Yrs 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 3 | 1 | Timothy Jones | 08 | Newquay | 5:08.94 |
| 4 | 3 | Tain Phillips | 08 | Plymouth Lea | 5:08.35 |
| 5 | 2 | Jack Bamborough | 08 | Co Cardiff | 5:08.57 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 5 | Matthew Scott | 09 | Newcastle | 5:06.75 |
| 1 | 7 | Jasper Hall | 08 | Newcastle | 5:05.87 |
| 2 | 9 | Gregor Ross | 08 | Co Glasgow | 5:04.83 |
| 3 | 11 | Jimmy McGuire | 08 | Chester Le S | 5:04.78 |
| 4 | 13 | Max Higgins | 08 | Millfield | 5:04.16 |
| 5 | 12 | George Prince | 08 | Hatfield | 5:04.49 |
| 6 | 10 | Jacob Light | 08 | N & D PP SC | 5:04.81 |
| 7 | 8 | Jack Collins | 08 | Co Sheffield | 5:05.14 |
| 8 | 6 | Archie Dandy | 08 | Co Leicester | 5:06.05 |
| 9 | 4 | Finlay Richardson | 09 | Guildford Ct | 5:07.85 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 15 | Hugh Mason-Williams | 08 | Co Birm'ham | 5:03.40 |
| 1 | 17 | Ethan Potter | 08 | Co Sheffield | 5:01.86 |
| 2 | 19 | William Hicklin | 09 | Co Leeds | 4:59.52 |
| 3 | 21 | Sandijs Cecins | 07 | Colchester | 4:58.91 |
| 4 | 23 | Zachariah Dale | 07 | Newcastle St | 4:58.52 |
| 5 | 22 | Thomas Traynor | 07 | Eastkilbride | 4:58.74 |
| 6 | 20 | Oliver Whittleston | 07 | Co Leeds | 4:59.13 |
| 7 | 18 | Aidan Orpin | 08 | Sutton Cheam | 5:01.27 |
| 8 | 16 | Euan Weir | 08 | Dun City Aqu | 5:03.25 |
| 9 | 14 | Oscar Goldsmith | 08 | South Lincs | 5:04.13 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 25 | Max El-Mokadem | 08 | RTW Monson | 4:57.88 |
| 1 | 27 | Hayden Annan | 07 | RTW Monson | 4:57.47 |
| 2 | 29 | Zak Troman | 07 | Colchester | 4:56.98 |
| 3 | 31 | Edward Ormsby | 07 | Co Cambridge | 4:55.45 |
| 4 | 33 | Ezra Lambert | 06 | Repton | 4:55.28 |
| 5 | 32 | Bryan Dinev | 06 | Bexley | 4:55.34 |
| 6 | 30 | Charles Simpson | 07 | Exeter City | 4:56.28 |
| 7 | 28 | Tom Hawkins | 07 | RTW Monson | 4:57.27 |
| 8 | 26 | James Burnett | 07 | Warrender Ba | 4:57.73 |
| 9 | 24 | William Viney | 07 | Co Birm'ham | 4:58.25 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 35 | Oren Jones | 06 | Crawley | 4:55.24 |
| 1 | 37 | Findlay Cordle | 07 | Repton | 4:54.83 |
| 2 | 39 | Ben McLaughlin | 06 | Garioch | 4:54.56 |
| 3 | 41 | Reagan Gallagher | 06 | TauntonDeane | 4:53.47 |
| 4 | 43 | Lewis Turner | 06 | Winsford | 4:53.16 |
| 5 | 42 | Isaac Buchan | 07 | N & D PP SC | 4:53.29 |
| 6 | 40 | Oliver Greaves | 07 | Wrekin SC | 4:54.32 |
| 7 | 38 | Jake Tomkins | 06 | Barnet Copt | 4:54.71 |
| 8 | 36 | Joseph Ashley | 08 | Warrington W | 4:55.12 |
| 9 | 34 | James Abulencia | 06 | Co Birm'ham | 4:55.25 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 45 | Fergus Thomson | 07 | Mt Kelly | 4:52.58 |
| 1 | 47 | Oliver Dennis | 07 | Plymouth Lea | 4:52.31 |
| 2 | 49 | Thomas Duddridge | 06 | Millfield | 4:51.97 |
| 3 | 51 | Rhys Darbey | 07 | Nofio Clwyd | 4:51.60 |
| 4 | 53 | Finlay Pope | 07 | Stockport Mo | 4:51.00 |
| 5 | 52 | Luke Stevens | 06 | Leic Sharks | 4:51.42 |
| 6 | 50 | Ronnie Weall | 07 | Warrington W | 4:51.89 |
| 7 | 48 | Jamie Steadman | 07 | Clevedon | 4:52.30 |
| 8 | 46 | Matthew McMillan | 06 | Incas | 4:52.46 |
| 9 | 44 | Jake Chesworth | 07 | Maxwell | 4:52.74 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 56 | Finlay Davies | 06 | Midlothian | 4:48.48 |
| 1 | 60 | Tristan Lee | 06 | Co Cardiff | 4:47.78 |
| 2 | 64 | Davey Unwin | 06 | Stockport Mo | 4:46.96 |
| 3 | 68 | David Annis | 06 | Pershore | 4:45.16 |
| 4 | 72 | Edward Marcal Whittles | 06 | Chelsea&West | 4:41.53 |
| 5 | 70 | Filip Nowacki | 07 | TigersJersey | 4:44.92 |
| 6 | 66 | Luke Poulton | 06 | Wycombe Dist | 4:45.99 |
| 7 | 62 | Llewellyn Porter | 08 | Camden Swiss | 4:47.16 |
| 8 | 58 | Daniel Jackson | 06 | Bo Kirklees | 4:47.89 |
| 9 | 54 | Jasper Jones | 07 | Northampton | 4:49.29 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 57 | Isaac Thompson | 08 | TigersJersey | 4:47.99 |
| 1 | 61 | Raheel Mahmood | 07 | Romford Town | 4:47.58 |
| 2 | 65 | Samuel Grimes | 06 | Wigan BEST | 4:46.19 |
| 3 | 69 | Luke Hornsey | 06 | East Lothian | 4:45.15 |
| 4 | 73 | Thomas Wilkinson | 06 | Co Sheffield | 4:39.69 |
| 5 | 71 | Kourosh Khodakhah | 07 | Co Leeds | 4:44.13 |
| 6 | 67 | James McClure | 06 | Co Coventry | 4:45.72 |
| 7 | 63 | Aran Bissett | 08 | RTW Monson | 4:47.14 |
| 8 | 59 | Thomas McDermott | 06 | Middlesboro | 4:47.86 |
| 9 | 55 | Daniel McGuinness | 06 | Basildon Ph | 4:49.00 |