EVENT 403 Mixed 12 Yrs/Under 25m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Sofia ASHLEY | 8 | Grantham | |
| 2 | 2 | Tabitha GODDARD | 9 | Grantham | |
| 3 | 3 | Cleo HARRIS | 8 | Grantham | |
| 4 | 4 | Holly PEARSON | 10 | Grantham | |
| 5 | 5 | Harry BIBBY | 9 | Grantham | |
| 6 | 6 | Jack CHAMBERS | 9 | Grantham | |
| 7 | 7 | Jia CHEN-REES | 9 | Grantham | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Timothy PENNOCK | 8 | Grantham | |
| 2 | 11 | Beatrix ELLERINGTON | 8 | Grantham | |
| 3 | 13 | Maja BALL | 10 | Grantham | |
| 4 | 15 | Margot ASSENZA | 9 | Grantham | 45.00 |
| 5 | 14 | Evelyn CHARITY | 10 | Grantham | |
| 6 | 12 | Charlie BLACKSHAW | 10 | Grantham | |
| 7 | 10 | Oscar BEMBRIDGE | 10 | Grantham | |
| 8 | 8 | Gilbert NICHOLLS | 9 | Grantham | |