EVENT 204 Open/Male 09 Yrs/Over 50m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Luke LAWS | 9 | Hoddesdon | 1:29.22 |
| 4 | 3 | Shivaansh MITTAL | 11 | Verulam | 1:01.13 |
| 5 | 2 | Shivai LEVEQUE | 10 | Hitchin | 1:12.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | David ABA | 12 | Stevenage | 56.30 |
| 2 | 7 | Joshua SAINSBURY | 10 | Stevenage | 53.12 |
| 3 | 9 | Aaron RUTT | 11 | Verulam | 52.50 |
| 4 | 11 | Ralph MISIR-YATES | 11 | Cheshunt | 48.97 |
| 5 | 10 | Jack MCDONALD | 13 | Potters Bar | 49.29 |
| 6 | 8 | Miles ARON | 11 | Potters Bar | 53.04 |
| 7 | 6 | Oliver OMAND | 9 | Cheshunt | 55.00 |
| 8 | 4 | Seb CATTON | 10 | Ware | 1:00.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | Oliver UGURLU | 10 | Cheshunt | 47.01 |
| 2 | 15 | Fares TAWFIKE | 12 | Co St Albans | 44.56 |
| 3 | 17 | Brodie FENTON | 11 | Ware | 43.06 |
| 4 | 19 | Samuel MULLANEY | 14 | Stevenage | 42.74 |
| 5 | 18 | Vihaan MISRA | 12 | Co St Albans | 42.76 |
| 6 | 16 | Callum LUCAS | 12 | Co St Albans | 44.36 |
| 7 | 14 | Erik MATIAS VEGH | 14 | Hitchin | 45.21 |
| 8 | 12 | Thomas CHALLIS | 12 | Potters Bar | 47.95 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 21 | Fabio GIAMBRONE | 13 | Cheshunt | 41.93 |
| 2 | 23 | Patrick MCKEAVENEY | 13 | Cheshunt | 40.43 |
| 3 | 25 | Atticus WALTERS GOW | 12 | Co St Albans | 40.19 |
| 4 | 27 | Harrison LLEWELLYN | 13 | Hitchin | 39.60 |
| 5 | 26 | Elliot JOHN | 13 | Stevenage | 39.97 |
| 6 | 24 | Bobby BUTCHER | 11 | Cheshunt | 40.35 |
| 7 | 22 | Jack MAPLE | 12 | Co St Albans | 40.61 |
| 8 | 20 | Ben BARTLETT | 11 | Cheshunt | 42.63 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 29 | Christian GIROTTO | 12 | Co St Albans | 39.37 |
| 2 | 31 | Stefan SORCINELLI | 11 | Co St Albans | 37.79 |
| 3 | 33 | Alexis MARRIAGA | 13 | Potters Bar | 36.49 |
| 4 | 35 | Dominic MONOVSKI | 12 | Hoddesdon | 34.60 |
| 5 | 34 | Max RICHARDSON | 15 | Hoddesdon | 35.31 |
| 6 | 32 | Harry SHAMBROOK | 13 | Hoddesdon | 36.54 |
| 7 | 30 | Yahya ELBANNA | 13 | Stevenage | 38.55 |
| 8 | 28 | Ryan TODD | 14 | Potters Bar | 39.42 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 37 | Theo KIELY | 14 | Co St Albans | 32.00 |
| 2 | 39 | Murad MAKHKAMOV | 13 | Potters Bar | 31.69 |
| 3 | 41 | Luigi GIAMBRONE | 15 | Cheshunt | 30.72 |
| 4 | 43 | Jesse HOWARD | 16 | Hoddesdon | 29.00 |
| 5 | 42 | Fin CAREY | 15 | Stevenage | 30.14 |
| 6 | 40 | Matas ZILINSKAS | 15 | Cheshunt | 31.15 |
| 7 | 38 | Oliver TUBRIDY | 15 | Stevenage | 31.83 |
| 8 | 36 | Daniel HILLMAN | 15 | Cheshunt | 32.12 |