EVENT 214 Mixed 09 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Violet NISBET | 13 | Grantham | |
| 2 | 2 | Juliette KIM | 10 | Grantham | |
| 3 | 3 | Ruby NISBET | 10 | Grantham | |
| 4 | 4 | Daniel GODDARD | 10 | Grantham | 7:41.38 |
| 5 | 5 | Taliyah MALLETT | 9 | Boston | 7:14.96 |
| 6 | 6 | Jack LANGLANDS | 11 | Calv Bing | 6:47.80 |
| 7 | 7 | Benjamin GODDARD | 12 | Grantham | 6:32.79 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Madeline SURTEES | 12 | Grantham | 6:25.01 |
| 2 | 9 | Harry MELDRUM | 13 | Co Lincoln P | 6:19.74 |
| 3 | 10 | Imogen ROTHWELL | 13 | Co Lincoln P | 6:12.40 |
| 4 | 11 | Damir IVANOVS | 9 | Boston | 6:01.57 |
| 5 | 12 | Leila MARANDI | 11 | Retford | 5:55.33 |
| 6 | 13 | Luiza KOZIOL | 16 | Lincoln TSA | 5:51.04 |
| 7 | 15 | Isabelle CLAYTON | 12 | Grantham | 5:48.08 |
| 8 | 16 | Joshua KIM | 12 | Grantham | 5:47.23 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Mia PARAPIJONAVICIUTE | 16 | Grantham | 5:43.68 |
| 2 | 18 | Leo BARNETT | 13 | Grantham | 5:43.23 |
| 3 | 19 | Cameron JAMISON | 9 | Lincoln TSA | 5:42.56 |
| 4 | 20 | Isobel DELDERFIELD | 11 | Co Lincoln P | 5:39.69 |
| 5 | 21 | Jimmin BAO | 11 | Grantham | 5:32.33 |
| 6 | 22 | George LEONARD | 12 | Grantham | 5:31.71 |
| 7 | 23 | Emma ARTHUR | 16 | Co Lincoln P | 5:25.41 |
| 8 | 24 | Zoe PARSONS | 15 | Lincoln TSA | 5:24.97 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Amy TAYLOR | 13 | Grantham | 5:06.62 |
| 2 | 28 | Phoebe LANGLANDS | 14 | Calv Bing | 4:59.76 |
| 3 | 30 | Matteo MONACO | 15 | South Lincs | 4:34.69 |
| 4 | 32 | Alexandra BULAT | 18 | Co Lincoln P | 4:18.48 |
| 5 | 31 | Luke DAYBELL | 15 | Grantham | 4:33.73 |
| 6 | 29 | Elena ALDENHOFF-KELLY | 16 | Grantham | 4:52.60 |
| 7 | 27 | Erin ARCHER | 14 | Co Lincoln P | 5:02.29 |
| 8 | 25 | Emily PENNELL | 14 | Co Lincoln P | 5:21.31 |