EVENT 104 Boys 11/13 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 2 | Samuel Smith | 11 | Kettering | 1:33.24 |
| 3 | 4 | Billy Reed | 11 | Grantham | 1:32.70 |
| 4 | 6 | Jamie Green | 11 | Co Lincoln P | 1:32.10 |
| 5 | 5 | Hou Yu Lei | 11 | Nova Cent'n | 1:32.47 |
| 6 | 3 | Callum Lees | 12 | Grantham | 1:33.02 |
| 7 | 1 | Harrison Casey | 12 | Eckington | 1:33.48 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 8 | Nat Miller-Walters | 12 | Co Derby | 1:31.94 |
| 2 | 10 | Matthew Pavier | 12 | Nova Cent'n | 1:31.30 |
| 3 | 12 | Joseph Lund | 12 | Deepings | 1:30.84 |
| 4 | 14 | Benjamin Hodkinson | 12 | Nova Cent'n | 1:30.00 |
| 5 | 13 | Luca Tramontano | 12 | Rykneld | 1:30.27 |
| 6 | 11 | Lewis Rounce | 12 | Nova Cent'n | 1:31.00 |
| 7 | 9 | Brandon Smith | 12 | Gainsborough | 1:31.45 |
| 8 | 7 | Ashley Lucas | 11 | Northampton | 1:32.04 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 16 | Max Turner | 12 | Co Lincoln P | 1:29.55 |
| 2 | 18 | Austin Johns | 12 | Co Leicester | 1:27.30 |
| 3 | 20 | Howie Barden | 13 | BelperMarlin | 1:26.80 |
| 4 | 22 | Alexander Cawthra | 13 | Co Lincoln P | 1:26.66 |
| 5 | 21 | Harvey Freeman | 12 | Northampton | 1:26.70 |
| 6 | 19 | Tobey Baker | 12 | Chesterfield | 1:26.92 |
| 7 | 17 | Joseph Vickers | 11 | Boston | 1:29.03 |
| 8 | 15 | Younis Peach | 12 | Northampton | 1:30.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 26 | Alexander Casey | 12 | Co Leicester | 1:26.00 |
| 2 | 32 | Thomas Deeley | 13 | Nova Cent'n | 1:24.60 |
| 3 | 38 | William Halstead | 13 | Calv Bing | 1:21.95 |
| 4 | 44 | Dominic Bools | 13 | Nova Cent'n | 1:17.60 |
| 5 | 41 | Brandon Hotham | 12 | Chesterfield | 1:21.20 |
| 6 | 35 | John-Petre Vassilev-Ne | 12 | Co Derby | 1:23.43 |
| 7 | 29 | Hosea Waweru | 12 | Co Leicester | 1:24.90 |
| 8 | 23 | Daniel McFerran | 13 | Nova Cent'n | 1:26.60 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 27 | George Berwick | 13 | Grantham | 1:25.71 |
| 2 | 33 | Joe Bagley | 13 | Swadlincote | 1:24.48 |
| 3 | 39 | Danny Skinner | 13 | Co Derby | 1:21.38 |
| 4 | 45 | Joseph Kingsland | 13 | Nova Cent'n | 1:17.30 |
| 5 | 42 | Bradley Evans | 13 | Long Eaton | 1:20.63 |
| 6 | 36 | Nicholas Meldrum | 13 | Nova Cent'n | 1:22.12 |
| 7 | 30 | Charlie Kaletha | 12 | Co Leicester | 1:24.71 |
| 8 | 24 | Kynan Wong | 13 | Ilkeston | 1:26.58 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 28 | Samuel Thomas | 13 | Corby | 1:25.14 |
| 2 | 34 | Nathan Allen | 12 | Co Leicester | 1:23.60 |
| 3 | 40 | Thomas Johnstone | 13 | Nova Cent'n | 1:21.30 |
| 4 | 46 | Guy Farnsworth | 13 | Co Derby | 1:16.40 |
| 5 | 43 | Matthew Broughton | 13 | Co Lincoln P | 1:18.00 |
| 6 | 37 | Jacob Whittle | 12 | Derventio | 1:22.00 |
| 7 | 31 | Thomas Ellis | 13 | Nova Cent'n | 1:24.70 |
| 8 | 25 | Matthew Woodhall | 12 | Nova Cent'n | 1:26.20 |