EVENT 204 Mens Open 50m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Thomas Ogden | 15 | Bishop Stort | 27.36 |
| 4 | 3 | Metin Mahmutoglu | 15 | Chelsea&West | 27.35 |
| 5 | 2 | Charlie Varker | 16 | Mt Kelly | 27.36 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 5 | Harold Cocking | 16 | Rotherham Mo | 27.31 |
| 2 | 7 | Naythan Aung | 15 | Colchester | 27.27 |
| 3 | 9 | Jan Poulton | 15 | Wycombe Dist | 27.24 |
| 4 | 11 | Archie Evans | 15 | Corby | 27.17 |
| 5 | 10 | Benjamin Green | 15 | Watford SC | 27.24 |
| 6 | 8 | Jack Allan | 16 | Mt Kelly | 27.25 |
| 7 | 6 | Stanislas Chausson | 16 | Millfield | 27.28 |
| 8 | 4 | Ellis Stephenson | 15 | Newport Pag | 27.32 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 13 | Matthew Hall | 15 | Millfield | 27.10 |
| 1 | 15 | Ramy El Ghaziri | 16 | Mt Kelly | 27.03 |
| 2 | 17 | Matthew Taylor | 16 | Guildford Ct | 26.96 |
| 3 | 19 | Maxwell George | 16 | Hatfield | 26.78 |
| 4 | 21 | Ethan Grace-Riches | 16 | Co Lincoln P | 26.55 |
| 5 | 20 | Ellis Morgan | 16 | Wycombe Dist | 26.72 |
| 6 | 18 | Samuel Greenbank | 16 | Cockermouth | 26.83 |
| 7 | 16 | Jacob Whittle | 15 | Derventio | 27.02 |
| 8 | 14 | Toby Hill | 15 | Prescot | 27.03 |
| 9 | 12 | Brandon Harris | 16 | Beachfield | 27.13 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 25 | Alexander Sargeant | 17 | Millfield | 26.40 |
| 1 | 31 | Jack Morgans | 19 | Winchester | 26.16 |
| 2 | 37 | Matthew Wright | 21 | Team Luton | 25.93 |
| 3 | 43 | Jake Tyson | 22 | teamipswich | 25.71 |
| 4 | 49 | Daniel Cross | 22 | Loughboro Un | 24.86 |
| 5 | 46 | Moritz Hoogers | 18 | Windsor | 25.45 |
| 6 | 40 | David O'Loughlin | 15 | Millfield | 25.84 |
| 7 | 34 | Matthew Gray | 19 | Co Leeds | 26.04 |
| 8 | 28 | Ian Lauritzen | 18 | Millfield | 26.31 |
| 9 | 22 | Walter Hackett | 16 | Dunstable | 26.50 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 26 | Julien Marabotto | 18 | SurreyUni SC | 26.36 |
| 1 | 32 | Samuel Williams | 19 | Arnold | 26.14 |
| 2 | 38 | Samuel Lawman | 24 | East Leeds | 25.88 |
| 3 | 44 | Harry Noble | 18 | Devonport | 25.65 |
| 4 | 50 | Jacob Peters | 19 | Poole | 24.77 |
| 5 | 47 | Thomas Beeley | 20 | Plymouth Lea | 25.18 |
| 6 | 41 | Billy Dewhurst | 18 | Co Manch Aq | 25.79 |
| 7 | 35 | Thomas Thornley | 20 | Loughboro Un | 26.01 |
| 8 | 29 | Shakil Giordani | 17 | Haringey | 26.27 |
| 9 | 23 | Robbie Hemmings | 15 | Poole | 26.49 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 27 | Daniel Jenkins | 18 | Co Oxford | 26.34 |
| 1 | 33 | Tyriese Smith | 15 | Co Liverpool | 26.10 |
| 2 | 39 | Alex Watkinson | 18 | Warrington W | 25.84 |
| 3 | 45 | Jamie Robertson | 19 | Portsmouth N | 25.51 |
| 4 | 51 | Thomas Howdle | 22 | Stockport Mo | 23.61 |
| 5 | 48 | Samuel Perks | 17 | Plymouth Lea | 25.11 |
| 6 | 42 | David Chang | 18 | Millfield | 25.72 |
| 7 | 36 | Mark Edmundson | 18 | Team Bath AS | 26.01 |
| 8 | 30 | Thomas Clare | 18 | teamipswich | 26.19 |
| 9 | 24 | Luca De Zilva | 16 | Leic Sharks | 26.42 |