EVENT 5 Girls 12 Yrs/Under 50m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Livia LUCATO HADELER | 10 | Co Cambridge | |
| 4 | 2 | Matilda WALTON | 9 | Co Cambridge | |
| 5 | 3 | Ella EDWARDS | 10 | Co Cambridge | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 4 | Sascha SEYMOUR | 9 | Co Cambridge | |
| 2 | 5 | Emily BOLT | 10 | Co Cambridge | |
| 3 | 6 | Alice WATTS | 9 | Co Cambridge | |
| 4 | 7 | Grace SMITH | 9 | Bottisham | |
| 5 | 8 | Alice O'TOOLE | 10 | Royston | |
| 6 | 9 | Beux DEMPSEY | 8 | Co Cambridge | |
| 7 | 10 | Emily HORNBY | 9 | Co Cambridge | |
| 8 | 11 | Rhiannon MONIE | 10 | Co Cambridge | 1:14.33 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 12 | Aoife LENIHAN | 9 | Co Cambridge | 1:06.13 |
| 2 | 13 | Livia MARSDEN | 10 | Bottisham | 1:04.22 |
| 3 | 14 | Ania KASPERKIEWICZ | 11 | Co Cambridge | 55.00 |
| 4 | 15 | Charisma CHANG | 12 | Co Cambridge | 55.00 |
| 5 | 16 | Amelia SANGSTER | 12 | Co Cambridge | 52.00 |
| 6 | 17 | Freya WHITE | 12 | Bottisham | 50.93 |
| 7 | 18 | Charlotte BIRCH | 12 | Co Cambridge | 50.67 |
| 8 | 19 | Priyanna MORRILL | 10 | Co Cambridge | 50.21 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 21 | Oraphin VANDERMEER | 8 | Co Cambridge | 48.40 |
| 2 | 23 | Ava BIRMINGHAM | 11 | Co Cambridge | 44.10 |
| 3 | 25 | Masha SKINNER | 12 | Co Cambridge | 42.90 |
| 4 | 27 | Anouk ZECCHINI | 11 | Co Cambridge | 36.12 |
| 5 | 26 | Amelia SPEECHLEY | 10 | Co Cambridge | 41.80 |
| 6 | 24 | Katie O'NEILL | 12 | Bottisham | 43.14 |
| 7 | 22 | Amelia SIMS | 11 | Co Cambridge | 47.02 |
| 8 | 20 | Vasilisa SHAMPANOVA | 10 | Co Cambridge | 49.80 |