EVENT 420 Boys 10/12 Yrs 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 1 | Samuel Templeton | 11 | Nova Cent'n | 6:12.48 |
| 3 | 2 | Jackson O'Rourke | 11 | Northampton | 6:36.57 |
| 4 | 3 | Benjamin Smith | 10 | Boldmere | 6:25.93 |
| 5 | 4 | William Pettit | 11 | Northampton | 6:19.89 |
| 6 | 5 | Jack Dolly | 11 | Co Coventry | 6:00.79 |
| 7 | 6 | Matthew Fallon | 11 | Nova Cent'n | 6:11.06 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 7 | Simon Sweatman | 11 | Pershore | 6:07.12 |
| 2 | 8 | Ben Cope | 11 | Royal Wolv | 6:05.37 |
| 3 | 9 | Hymie Connell | 11 | Co Coventry | DQ:T . |
| 4 | 10 | Daniel Johnson | 11 | Wrekin Coll | 5:57.61 |
| 5 | 11 | Thomas Watkin | 11 | Royal Wolv | 5:57.62 |
| 6 | 12 | William Hawkes | 11 | Grantham | 5:44.72 |
| 7 | 13 | Joshua Harris | 11 | Nova Cent'n | 5:57.93 |
| 8 | 14 | Lewis McGarry | 11 | Boston | 6:07.75 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 15 | Lewis Bontoft | 11 | Boston | 6:09.03 |
| 2 | 16 | Luke Mitchell | 11 | Nova Cent'n | 5:51.90 |
| 3 | 17 | Oliver Lillycrop | 11 | Co Birm'ham | 5:56.13 |
| 4 | 18 | Harry Puffett | 12 | Co Leicester | 5:54.11 |
| 5 | 19 | Matthew Richmond | 12 | Northampton | 5:44.13 |
| 6 | 20 | Owen Ottaway | 11 | Nova Cent'n | 5:45.72 |
| 7 | 21 | Tobias Cooper | 12 | Nova Cent'n | 6:01.74 |
| 8 | 22 | Ross Large | 12 | Nova Cent'n | 5:54.51 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 23 | Matthew Shipley | 11 | Nova Cent'n | 5:38.03 |
| 2 | 24 | Benjamin Black | 12 | Co Coventry | 5:50.26 |
| 3 | 25 | Harry Bamforth | 12 | Worcester | 5:43.72 |
| 4 | 26 | Jorge Stevenson | 12 | Nova Cent'n | 5:40.69 |
| 5 | 27 | William Barber | 11 | Lincoln Vulc | 5:56.47 |
| 6 | 28 | Luke Smith | 12 | Royal Wolv | 5:40.24 |
| 7 | 29 | Shay Bradley | 12 | Co Derby | 5:33.55 |
| 8 | 30 | Archie Plowman | 12 | Northampton | 5:42.60 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 31 | Gregory Butler | 12 | Newcastle St | DQ:SL. |
| 2 | 32 | Tyler McLean | 12 | Ellesmere Co | 5:21.80 |
| 3 | 33 | Tom Page | 12 | Redditch | 5:33.11 |
| 4 | 34 | Stephen Taylor | 11 | Northampton | 5:38.26 |
| 5 | 35 | Joshua Tapsell | 12 | Leic Peng | 5:57.36 |
| 6 | 36 | Benjamin Sharrocks | 12 | Nova Cent'n | 5:24.76 |
| 7 | 37 | Samuel Osborne | 12 | Co Birm'ham | 5:32.79 |
| 8 | 38 | Alasdair Wicks | 12 | Leic Peng | 5:31.43 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 40 | Hector Pardoe | 12 | Ellesmere Co | 5:34.32 |
| 2 | 42 | Joel Weston | 12 | Co Leicester | 5:29.20 |
| 3 | 44 | Joshua Munroe | 12 | Co Leicester | 5:26.92 |
| 4 | 46 | Luca Formosa | 12 | Nova Cent'n | 5:16.76 |
| 5 | 45 | Thomas Ryan | 12 | Co Leicester | 5:19.56 |
| 6 | 43 | Daniel Savage | 12 | Northampton | 5:21.54 |
| 7 | 41 | Thomas Smith | 12 | Co Leicester | 5:56.82 |
| 8 | 39 | Leo Karski | 11 | Co Birm'ham | 5:28.53 |