EVENT 505 Men 50m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Edun Rowe | 15 | Northampton | 28.74 |
| 4 | 3 | Michael Banks | 15 | Bromley | 28.13 |
| 5 | 2 | Thomas Marshall | 14 | Exeter City | 27.63 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 5 | Josh Scrivener | 14 | Bicester | 27.91 |
| 1 | 7 | Jude Gunner | 14 | St Felix Sch | 28.31 |
| 2 | 9 | Timothy Jones | 15 | Newquay | 28.19 |
| 3 | 11 | Edward Henwood | 14 | Wandsworth | 28.07 |
| 4 | 13 | Benjamin Beale | 13 | N & D PP SC | 27.87 |
| 5 | 12 | Sebastian Grenardo | 14 | Dartmoor DA | 27.70 |
| 6 | 10 | Joshua Burkill | 14 | Sutton Cheam | 27.82 |
| 7 | 8 | Jack Keers | 14 | Teddington | DN:C . |
| 8 | 6 | Oscar Devaal | 14 | Biddulph | 28.27 |
| 9 | 4 | Matthew Scott | 14 | Newcastle | 28.99 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 15 | Hubert Pytlowany | 15 | Ealing | 27.91 |
| 1 | 17 | Benjamin Dale-Wood | 15 | Thirsk WH | 27.17 |
| 2 | 19 | Finley Mooney | 15 | Cirencester | 27.60 |
| 3 | 21 | George Moore | 17 | Co Leicester | DN:C . |
| 4 | 23 | Toby Nakamura-Drew | 14 | Dartmoor DA | 27.67 |
| 5 | 22 | Sebastian Ebanks | 16 | Derby Excel | 26.93 |
| 6 | 20 | Samuel Cooke | 17 | Corby | 27.12 |
| 7 | 18 | Oli Bottomley | 15 | Co Salford | 27.31 |
| 8 | 16 | Harrison Shaw | 16 | Flitwick | 27.53 |
| 9 | 14 | Edward Chesworth | 14 | Millfield | 28.40 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 25 | Berdan Ordek | 15 | Warrington W | DN:C . |
| 1 | 27 | Xander Tovey | 13 | Co Coventry | 27.87 |
| 2 | 29 | Matthew Clark | 15 | Eastbourne | 26.64 |
| 3 | 31 | Ryan Close | 15 | Modernian | 27.32 |
| 4 | 33 | Liam Hamp | 17 | Thanet Swim | 27.16 |
| 5 | 32 | Harrison Galloway | 15 | Co Bristol | 27.51 |
| 6 | 30 | Joshua Parker | 14 | Braintree | 27.50 |
| 7 | 28 | Danylo Kravchenko | 14 | New Hall | 27.55 |
| 8 | 26 | Ethan Williams | 16 | Newcastle | 27.87 |
| 9 | 24 | Thomas Swales | 14 | Nova Cent'n | 27.53 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 35 | Thomas Bennett | 16 | Plymouth Lea | 27.19 |
| 1 | 37 | Oscar Bellinger | 15 | Salisbury | 27.11 |
| 2 | 39 | Luca Sartorius | 16 | Poole | 26.97 |
| 3 | 41 | Ollie O'Connor | 15 | Putteridge | DN:C . |
| 4 | 43 | Aquiles Bello | 15 | Elmbridge | 26.78 |
| 5 | 42 | Joseph Readhead | 17 | Guildford Ct | 26.97 |
| 6 | 40 | Hawkan Hall | 17 | Co Milton K | 26.99 |
| 7 | 38 | William Gowler | 16 | N & D PP SC | 27.26 |
| 8 | 36 | Alexander Moore | 16 | Wycombe Dist | 27.30 |
| 9 | 34 | Louis Thorne | 16 | Co Bristol | 27.36 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 45 | Harry Milne | 15 | Repton | 27.38 |
| 1 | 47 | Jenson Owen | 14 | Co Sheffield | 26.76 |
| 2 | 49 | Oliver Pike | 16 | Co Norwich | 27.20 |
| 3 | 51 | Henry Dean | 15 | S Bournem'th | 26.65 |
| 4 | 53 | Joseph Swart | 17 | TigersJersey | 26.97 |
| 5 | 52 | Charlie Rounce | 16 | Leamington | 27.04 |
| 6 | 50 | Oliver Osborne | 16 | Derby Excel | 27.25 |
| 7 | 48 | Kal-El Ntiamoah | 15 | Beckenham | 27.63 |
| 8 | 46 | Max Stafford-Davies | 15 | Chelsea&West | 27.07 |
| 9 | 44 | Reagan Gallagher | 17 | TauntonDeane | DN:C . |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 57 | Monty Smith | 14 | Wycombe Dist | 27.04 |
| 1 | 63 | Thomas Parrott | 16 | Mt Kelly | 26.19 |
| 2 | 69 | Daniel Jackson | 17 | Bo Kirklees | DN:C . |
| 3 | 75 | Harry Jones | 23 | Co Norwich | 25.71 |
| 4 | 81 | James Bayliss | 20 | Queensland | 24.41 |
| 5 | 78 | Adrian Ting | 21 | Birm'ham Uni | 25.13 |
| 6 | 72 | Maddox Roberts | 17 | Witham Dolph | 25.73 |
| 7 | 66 | Zain Salah | 14 | Hamilton UAE | 26.30 |
| 8 | 60 | Ethan Soppett-Moss | 14 | Corby | 26.36 |
| 9 | 54 | Owen Whiteley | 17 | Ramsbottom | 27.67 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 58 | Freddie Sadler | 17 | Winchester | 26.67 |
| 1 | 64 | Ewan Cox | 15 | Co Lincoln P | 26.54 |
| 2 | 70 | Maximus Leigh | 17 | S Bournem'th | 25.88 |
| 3 | 76 | Benjamin Tritton | 23 | SurreyUni SC | 25.10 |
| 4 | 82 | Harrison Turner | 19 | Queensland | 24.53 |
| 5 | 79 | Alec White | 22 | Exeter City | 25.62 |
| 6 | 73 | Patrick Heeks | 20 | Pershore | 25.94 |
| 7 | 67 | Alexandru Lazar | 16 | N & D PP SC | DN:C . |
| 8 | 61 | Jack Allman | 17 | Wycombe Dist | 27.62 |
| 9 | 55 | Zac Cooper | 16 | Millfield | 26.68 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 59 | Ben Gooch | 16 | Worcester | 26.44 |
| 1 | 65 | Daniel Oyaide-Nicholls | 17 | NottmLeander | 26.46 |
| 2 | 71 | Luka Page | 17 | West Suffolk | 26.50 |
| 3 | 77 | Mark Edmundson | 22 | Team Bath AS | DN:C . |
| 4 | 83 | Jack Carr | 22 | Queensland | 23.97 |
| 5 | 80 | Alex Fahey | 20 | Queensland | 24.87 |
| 6 | 74 | Charlie Broome | 19 | Co Leeds | 25.81 |
| 7 | 68 | Lewis Hawden | 17 | Bev Barracud | 26.22 |
| 8 | 62 | Sean Smith | 16 | Skipton | 26.79 |
| 9 | 56 | Luke Knight | 14 | Brompton | 27.64 |