EVENT 607 Open/Male 50m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Lucas Newboult | 15 | Lincoln Vulc | 28.24 |
| 2 | 3 | Seth Hems Gillson | 14 | Repton | 28.10 |
| 3 | 5 | Charlie Wheeler-Kaye | 15 | Worksop | 28.00 |
| 4 | 7 | Benjamin Roberts | 15 | Grantham | 27.95 |
| 5 | 6 | Sebastian Casey | 14 | Hinckley | 28.00 |
| 6 | 4 | Oliver Sealey | 16 | Louth | 28.08 |
| 7 | 2 | Zach Silcock | 16 | CarltonForum | 28.10 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Henry Jones | 15 | Dronfield | 27.90 |
| 2 | 11 | Aman Thethy | 16 | Rushden | 27.67 |
| 3 | 13 | Bradley Holland | 16 | South Lincs | 27.42 |
| 4 | 15 | Danny Barron | 16 | Etwall | 27.40 |
| 5 | 14 | Alex Bates | 14 | Chesterfield | 27.40 |
| 6 | 12 | Joseph Stirland | 15 | Bramcote | 27.50 |
| 7 | 10 | Joshua Clarke | 16 | Grantham | 27.89 |
| 8 | 8 | Daniel Doyle | 16 | Kettering | 27.93 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Jacob Hodkinson | 17 | Bassetlaw SS | 27.20 |
| 2 | 19 | Eden Saint | 14 | BelperMarlin | 27.10 |
| 3 | 21 | Jake Franse | 17 | Worksop | 27.00 |
| 4 | 23 | Lynden Johnson | 21 | Hucknall | 26.81 |
| 5 | 22 | Thomas Macmanard | 17 | Loughborough | 26.96 |
| 6 | 20 | Christopher Richardson | 19 | Uni of Nott | 27.00 |
| 7 | 18 | Miles Willetts | 15 | Repton | 27.15 |
| 8 | 16 | Ryan Ingram | 16 | Repton | 27.27 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 25 | Jared Collins | 16 | Sutton | 26.70 |
| 2 | 27 | James Dobney | 20 | Grantham | 26.56 |
| 3 | 29 | Aaron Warren | 23 | Northampton | 26.50 |
| 4 | 31 | Adam Frazer | 18 | Rushden | 26.39 |
| 5 | 30 | Thomas Boyt | 25 | Northampton | 26.40 |
| 6 | 28 | Cole Angell | 16 | Kettering | 26.53 |
| 7 | 26 | Morgan Farrar | 15 | Co Lincoln P | 26.70 |
| 8 | 24 | Jaden Leo | 15 | Derby Excel | 26.80 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 33 | Noah Van Hoorebeek | 17 | Chesterfield | 26.21 |
| 2 | 35 | Thomas Rochelle | 21 | Derby Excel | 26.20 |
| 3 | 37 | Daniel Oyaide-Nicholls | 18 | NottmLeander | 26.00 |
| 4 | 39 | Joseph Fowler | 18 | Uni of Nott | 26.00 |
| 5 | 38 | Ryan Lim | 17 | Nova Cent'n | 26.00 |
| 6 | 36 | Joseph Parnell | 17 | Co Lincoln P | 26.20 |
| 7 | 34 | Kyle Merryweather | 20 | CarltonForum | 26.20 |
| 8 | 32 | Martin Iankov | 16 | Repton | 26.30 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 43 | Roman Levchenko | 16 | Derby Excel | 25.70 |
| 2 | 49 | Ryan Coles | 19 | Daventry | 25.40 |
| 3 | 55 | Louis Mitchell | 23 | Corby | 24.97 |
| 4 | 61 | Daniel Gencas | 21 | Lboro Uni | 24.10 |
| 5 | 58 | Leo Pollock | 18 | Nova Cent'n | 24.60 |
| 6 | 52 | Ewan Cox | 16 | Repton | 25.20 |
| 7 | 46 | Jacob Mills | 17 | Repton | 25.50 |
| 8 | 40 | Alex Bainbridge | 19 | Uni of Nott | 26.00 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 44 | M Vasconcellos-Blanch | 16 | Rushden | 25.50 |
| 2 | 50 | Adam Metcalf | 23 | Loughborough | 25.38 |
| 3 | 56 | Noah Retzler | 19 | Lboro Uni | 24.95 |
| 4 | 62 | Ethan Soppett-Moss | 15 | Corby | 23.80 |
| 5 | 59 | Luca Plater | 20 | Lboro Uni | 24.30 |
| 6 | 53 | Harry Milne | 16 | Repton | 25.20 |
| 7 | 47 | James Annable | 18 | Derby Excel | 25.50 |
| 8 | 41 | Bradley Mitchell | 19 | Uni of Nott | 25.90 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 45 | Laurel Roberts-Burrell | 17 | Derby Excel | 25.50 |
| 2 | 51 | Harley James | 19 | Lboro Uni | 25.30 |
| 3 | 57 | Charles Simpson | 17 | Repton | 24.60 |
| 4 | 63 | Joe Litchfield | 26 | Lboro Uni | 23.00 |
| 5 | 60 | Maddox Roberts | 18 | Lboro Uni | 24.15 |
| 6 | 54 | Thomas Page | 20 | NottmLeander | 25.00 |
| 7 | 48 | Angelo Giani Contini | 18 | Lboro Uni | 25.50 |
| 8 | 42 | Sachin Thethy | 20 | Rushden | 25.77 |