EVENT 102 Mens Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 2 | Mason Hunnisett | 13 | Basildon Ph | 1:08.40 |
| 4 | 4 | Jack Dolly | 13 | Co Leicester | 1:07.97 |
| 5 | 3 | Sean-Patrick McGowan | 12 | Hillingdon | 1:08.37 |
| 6 | 1 | Cameron Lewis | 13 | Gloucester | 1:08.42 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 6 | Ewan Wilson | 13 | Co Salford | 1:07.81 |
| 1 | 8 | Ryan Wheeler | 13 | Winsford | 1:07.69 |
| 2 | 10 | Nathaniel Rodrigues | 13 | Sevenoaks | 1:07.50 |
| 3 | 12 | William Barber | 13 | Lincoln Vulc | 1:07.28 |
| 4 | 14 | Jack Bowyer | 13 | West Suffolk | 1:07.09 |
| 5 | 13 | Ethan Murtagh | 13 | Leinster IRL | 1:07.18 |
| 6 | 11 | Eugene Brooks-Clarke | 13 | Co Sheffield | 1:07.49 |
| 7 | 9 | Kyo Tanner | 13 | Preston | 1:07.54 |
| 8 | 7 | Max Weeks | 13 | Seagulls SC | 1:07.76 |
| 9 | 5 | Samuel Salih | 13 | Co Sheffield | 1:07.96 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 16 | Nathan Cullen | 13 | Bo Kirklees | 1:06.81 |
| 1 | 18 | Aaron Carroll | 13 | Munster IRL | 1:06.35 |
| 2 | 20 | Will Morris | 13 | Tynemouth | 1:05.64 |
| 3 | 22 | Jeremy O'Connor | 13 | Munster IRL | 1:05.51 |
| 4 | 24 | Billy Pettit | 14 | Northampton | 1:04.98 |
| 5 | 23 | James Cooper | 13 | Romford Town | 1:05.29 |
| 6 | 21 | Edward Mildred | 12 | Northampton | 1:05.63 |
| 7 | 19 | Finnian Trehane | 13 | Bourmth Coll | 1:05.69 |
| 8 | 17 | Manfred Battle | 13 | Stowmarket | 1:06.49 |
| 9 | 15 | Max Martin | 13 | SwimTrafford | 1:07.07 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 26 | Alfie Evans | 14 | Basingstoke | 1:04.64 |
| 1 | 28 | Samuel Wardle | 14 | Co Leeds | 1:04.52 |
| 2 | 30 | Mario Coman | 14 | Newcastle St | 1:04.49 |
| 3 | 32 | William Graham | 14 | Melton M'bry | 1:04.29 |
| 4 | 34 | James Cuthbert | 14 | Halesowen | 1:04.09 |
| 5 | 33 | Simon Kliment | 14 | Donc Dartes | 1:04.27 |
| 6 | 31 | Benjamin Samuel | 14 | Bourmth Coll | 1:04.43 |
| 7 | 29 | William Camden | 14 | Co Salford | 1:04.49 |
| 8 | 27 | Piers Bowden | 14 | Guildford Ct | 1:04.56 |
| 9 | 25 | Sean Scannell | 13 | Leinster IRL | 1:04.91 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 36 | Mateusz Szopinski | 14 | Saxon Crown | 1:04.01 |
| 1 | 38 | Lucas Dyson-Diaz | 15 | Bo Of Harrow | 1:02.39 |
| 2 | 40 | James Eddy | 15 | Wycombe Dist | 1:02.28 |
| 3 | 42 | Kieran Beckett | 15 | Co South'ton | 1:02.18 |
| 4 | 44 | Harry Stacey | 15 | Brighton | 1:02.06 |
| 5 | 43 | Samuel Pereira | 15 | Enfield Sq | 1:02.12 |
| 6 | 41 | Ryan Smith | 15 | UEA Norwich | 1:02.22 |
| 7 | 39 | Ben Hooper | 15 | Bo Of Harrow | 1:02.34 |
| 8 | 37 | Niall Dunn | 14 | Aquabears | 1:04.00 |
| 9 | 35 | Youssef Nkrumah | 14 | Bo Of Harrow | 1:04.09 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 48 | Jack To | 15 | Co Sheffield | 1:01.75 |
| 1 | 54 | Aaron Hill | 17 | Warrington W | 58.88 |
| 2 | 60 | Robert Hamer | 17 | Preston | 58.08 |
| 3 | 66 | Oliver Lines | 17 | Co Milton K | 57.42 |
| 4 | 72 | Antony Evitts | 20 | Co Liverpool | 56.45 |
| 5 | 69 | William Condron | 20 | Portsmouth N | 56.92 |
| 6 | 63 | Freddy Clampett | 17 | Plymouth Lea | 57.57 |
| 7 | 57 | R Ormonde-Cunningham | 17 | Dulwich Dolp | 58.70 |
| 8 | 51 | Callum Davis | 15 | Bishop Stort | 1:01.51 |
| 9 | 45 | Miles Clark | 15 | Ealing | 1:02.03 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 49 | Dylan Conway | 15 | Kingston Roy | 1:01.66 |
| 1 | 55 | Jake Dixon | 17 | Co Birm'ham | 58.86 |
| 2 | 61 | Jacob Jackson | 17 | Ellesmere Co | 57.72 |
| 3 | 67 | Edward Allchorne | 21 | Hatfield | 57.34 |
| 4 | 73 | Reece Dunn | 20 | Plymouth Lea | 56.21 |
| 5 | 70 | Robin Williams | 25 | Worcester | 56.91 |
| 6 | 64 | George Epsly | 17 | Basildon Ph | 57.54 |
| 7 | 58 | Liam Curran | 17 | Co St Albans | 58.50 |
| 8 | 52 | Brandon Sharkey | 17 | Winsford | 59.08 |
| 9 | 46 | Adam Blackshaw | 15 | Winsford | 1:02.02 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 50 | Ewan McKavett | 15 | Pioneer 79 | 1:01.61 |
| 1 | 56 | Mason Jacques | 17 | Co Sund'land | 58.71 |
| 2 | 62 | James Baxter | 17 | Wycombe Dist | 57.71 |
| 3 | 68 | Paul Wilkes | 31 | Redditch | 57.28 |
| 4 | 74 | Dominic Wooldridge | 20 | Exeter City | 56.09 |
| 5 | 71 | Tudor Puszet | 19 | Ealing | 56.87 |
| 6 | 65 | Matthew Bray | 19 | Utd Bristol | 57.43 |
| 7 | 59 | Harry Parker | 17 | Hatfield | 58.12 |
| 8 | 53 | Daniel Hall | 17 | Co Leeds | 58.94 |
| 9 | 47 | Jake Thomas-Mansfield | 15 | West Suffolk | 1:01.93 |