EVENT 503 Open/Male 50m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 2 | Edward Rosnovat | 15 | Coalville | 32.60 |
| 4 | 4 | Raymond Dalby-Rose | 14 | Worksop | 32.30 |
| 5 | 3 | Morgan Farrar | 15 | Co Lincoln P | 32.35 |
| 6 | 1 | Ellis Bancroft | 16 | Loughborough | 33.07 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Jared Collins | 16 | Sutton | 32.13 |
| 2 | 8 | Aidan Fitzgibbon | 16 | Co Lincoln P | 32.00 |
| 3 | 10 | Jack Zeravica | 16 | Grantham | 31.63 |
| 4 | 12 | Zachary Drayson | 15 | Derby Excel | 31.20 |
| 5 | 11 | Niklas Saukko-Paavola | 16 | Nova Cent'n | 31.40 |
| 6 | 9 | Finlay Underwood | 15 | Rushden | 31.90 |
| 7 | 7 | Layne Keyworth | 16 | Bassetlaw SS | 32.04 |
| 8 | 5 | Harrison Grix-White | 16 | Dronfield | 32.13 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 14 | Max Holland | 16 | Nova Cent'n | 31.10 |
| 2 | 16 | Evan Hawley | 17 | Sutton | 31.00 |
| 3 | 18 | Joseph Wright | 15 | Chesterfield | 30.90 |
| 4 | 20 | Eden Saint | 14 | BelperMarlin | 30.70 |
| 5 | 19 | Harrison Clarke | 16 | Radford | 30.80 |
| 6 | 17 | Kyle Merryweather | 20 | CarltonForum | 31.00 |
| 7 | 15 | Cole Angell | 16 | Kettering | 31.04 |
| 8 | 13 | Thomas Boyt | 25 | Northampton | 31.20 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Aryan Nath | 15 | Corby | 30.50 |
| 2 | 30 | Jacob Hodkinson | 17 | Bassetlaw SS | 29.80 |
| 3 | 36 | Cameron White | 22 | Uni of Nott | 28.60 |
| 4 | 42 | Michael Grachev | 19 | Uni of Nott | 28.00 |
| 5 | 39 | Caleb O'Brien | 23 | Corby | 28.30 |
| 6 | 33 | Daniel Oyaide-Nicholls | 18 | NottmLeander | 29.60 |
| 7 | 27 | Benjamin Roberts | 15 | Grantham | 30.20 |
| 8 | 21 | Nathan Morgan | 18 | Repton | 30.70 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 25 | Paul Page | 17 | Hinckley | 30.50 |
| 2 | 31 | James Annable | 18 | Derby Excel | 29.80 |
| 3 | 37 | Charles Simpson | 17 | Repton | 28.50 |
| 4 | 43 | Adam Metcalf | 23 | Loughborough | 27.81 |
| 5 | 40 | Harvey Freeman | 20 | Lboro Uni | 28.22 |
| 6 | 34 | Ethan Lawton | 23 | Derby Excel | 29.26 |
| 7 | 28 | Luke Witten | 20 | Long Eaton | 30.10 |
| 8 | 22 | Alex Manley | 32 | Lincoln Vulc | 30.70 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Adam Frazer | 18 | Rushden | 30.48 |
| 2 | 32 | Max Balderson | 21 | Rushden | 29.67 |
| 3 | 38 | William Tonks | 16 | Repton | 28.40 |
| 4 | 44 | Gregory Butler | 24 | Lboro Uni | 26.50 |
| 5 | 41 | Thomas Page | 20 | NottmLeander | 28.00 |
| 6 | 35 | Tyler Tombs | 19 | Nova Cent'n | 28.70 |
| 7 | 29 | Aman Thethy | 16 | Rushden | 30.00 |
| 8 | 23 | Jaden Leo | 15 | Derby Excel | 30.65 |