EVENT 506 Mens Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 2 | 1 | Lachlan MACBETH | 26 | S14 | Runnymede | 1:31.83 |
| 3 | 3 | James MCFARLAND | 18 | | C Beds SS | 1:02.48 |
| 4 | 5 | Freddie LAWS | 16 | | West Norfolk | 1:02.16 |
| 5 | 4 | Alfie FRANCIS | 14 | | Colchester | 1:02.30 |
| 6 | 2 | Mark EVENS | 23 | S14 | Bor of Brox | 1:15.55 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 7 | B DITCHFIELD-WATKINS | 16 | | Leighton Buz | 1:02.00 |
| 2 | 9 | Dennis MHINI | 18 | | St Felix Sch | 1:01.83 |
| 3 | 11 | William MARCH | 17 | | Linslade | 1:01.62 |
| 4 | 13 | Ryan WEBB | 18 | | Gt Yarmouth | 1:01.59 |
| 5 | 12 | Christopher WILLIAMSON | 14 | | Co Cambridge | 1:01.60 |
| 6 | 10 | Zachary PATEL | 18 | | Berkhamsted | 1:01.64 |
| 7 | 8 | Jude HILLS | 14 | | Thurrock | 1:01.90 |
| 8 | 6 | J THURSTON-WOOLNOUGH | 16 | | Beccles Town | 1:02.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 15 | Ethan PEIRCE | 15 | | Harlow Pen | 1:01.41 |
| 2 | 17 | Thomas DAVIS | 24 | | St Ives | 1:01.40 |
| 3 | 19 | Charlie BARRETT | 18 | | Co Norwich | 1:01.30 |
| 4 | 21 | Morgan FOSTER | 16 | | Braintree | 1:01.20 |
| 5 | 20 | Jack JACKSON | 23 | | Bushey | 1:01.26 |
| 6 | 18 | Lewis MARSTON | 17 | | Runnymede | 1:01.39 |
| 7 | 16 | Samuel DAY | 16 | | Beccles Town | 1:01.40 |
| 8 | 14 | Matteo LO BIUNDO | 16 | | Bor of Brox | 1:01.50 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 23 | Ismail RAHIM | 17 | | Berkhamsted | 1:01.03 |
| 2 | 25 | Daniel ENGLISH | 17 | | Bor of Brox | 1:00.73 |
| 3 | 27 | Ralph DAVIES | 18 | | Harlow Pen | 1:00.40 |
| 4 | 29 | Peter SOCZEWKA | 14 | | Hatfield | 1:00.10 |
| 5 | 28 | Samuel MILLER | 16 | | Basildon Ph | 1:00.34 |
| 6 | 26 | Ashley HOLNESS-WRIGHT | 23 | | Watford SC | 1:00.53 |
| 7 | 24 | Luke BRYAN | 19 | | West Norfolk | 1:00.90 |
| 8 | 22 | Joshua TRAPP | 18 | | Hertford | 1:01.16 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 31 | Joseph WELLS | 20 | | West Norfolk | 59.90 |
| 2 | 33 | Myles ROBINSON-YOUNG | 17 | | Co Peterboro | 59.80 |
| 3 | 35 | Damon ELLIOTT | 15 | | DunmowAtlant | 59.50 |
| 4 | 37 | Oliver KENNY | 22 | | West Norfolk | 59.40 |
| 5 | 36 | Samuel ROSE | 16 | | St Felix Sch | 59.42 |
| 6 | 34 | Joshua HOLLAND | 16 | | Hertford | 59.61 |
| 7 | 32 | Joel GREEN | 19 | | Hemel Hemp | 59.89 |
| 8 | 30 | Daniel MILLAR | 19 | | Co St Albans | 1:00.10 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 39 | Henry PEARCE | 17 | | Co Peterboro | 59.30 |
| 2 | 41 | Liam BARNETT | 32 | | Co Cambridge | 59.20 |
| 3 | 43 | Kai ADAMS | 23 | | Halstead | 58.84 |
| 4 | 45 | Jordan CATCHPOLE | 20 | S14 | Co Norwich | 58.70 |
| 5 | 44 | Thomas BOYT | 20 | | Felixstowe | 58.80 |
| 6 | 42 | Lewis CHAPMAN | 18 | | Stowmarket | 59.10 |
| 7 | 40 | Jack TURRELL | 16 | | Basildon Ph | 59.20 |
| 8 | 38 | Callum DAVIS | 19 | | Bishop Stort | 59.30 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 49 | Harrison LEES | 18 | | Watford SC | 58.10 |
| 2 | 55 | Elliot COOK | 25 | | teamipswich | 57.17 |
| 3 | 61 | Jack BOWYER | 17 | | West Suffolk | 56.60 |
| 4 | 67 | Theo CANNON | 20 | | Co Cambridge | 55.40 |
| 5 | 64 | Manfred BATTLE | 17 | | Co Cambridge | 56.10 |
| 6 | 58 | Collins SALIBOKO | 17 | | St Felix Sch | 56.80 |
| 7 | 52 | Callum WOLLASTON | 18 | | Bor of Brox | 57.40 |
| 8 | 46 | Samuel PECK | 19 | | Co Cambridge | 58.60 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 50 | Devesh KAPOOR | 16 | | Hemel Hemp | 57.70 |
| 2 | 56 | Nathan WOODROW | 16 | | Co Norwich | 56.90 |
| 3 | 62 | Matthew WRIGHT | 21 | | Team Luton | 56.22 |
| 4 | 68 | Hugo BELLAMY | 21 | | Co Cambridge | 55.10 |
| 5 | 65 | Harry JONES | 19 | | Co Norwich | 55.70 |
| 6 | 59 | Nathan WELLS | 21 | | West Norfolk | 56.60 |
| 7 | 53 | Lucas DYSON-DIAZ | 19 | | Hatfield | 57.22 |
| 8 | 47 | Adam MARTIN | 19 | | Potters Bar | 58.60 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 51 | Joshua BRIDGELAND | 16 | | Hatfield | 57.40 |
| 2 | 57 | Herbie KINDER | 17 | | Co Peterboro | 56.80 |
| 3 | 63 | Matthew TITMAN | 18 | | Co Cambridge | 56.17 |
| 4 | 69 | James WOODWARD | 19 | | Hatfield | 54.00 |
| 5 | 66 | Michael KLIMASZEWSKI | 15 | | Hatfield | 55.40 |
| 6 | 60 | Elliott DAY | 17 | | teamipswich | 56.60 |
| 7 | 54 | Charles WHYTE | 18 | | West Suffolk | 57.20 |
| 8 | 48 | Connor WALKER | 15 | | Co Peterboro | 58.60 |