EVENT 214 Mixed 09 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Esme LUCAS | 9 | South Lincs | 8:27.09 |
| 4 | 3 | Faith SMITH | 14 | Lincoln TSA | 7:30.00 |
| 5 | 2 | Matilda MCDONNELL | 11 | Grantham | 7:30.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Eden DYSON | 12 | Grantham | 6:53.10 |
| 3 | 7 | Iris Acacia LUCAS | 12 | South Lincs | 6:31.06 |
| 4 | 9 | Eugene CHEU | 12 | Grantham | 6:08.29 |
| 5 | 8 | Luiza KOZIOL | 15 | Lincoln TSA | 6:27.98 |
| 6 | 6 | Benjamin GODDARD | 11 | Grantham | 6:40.00 |
| 7 | 4 | Emilijus BINKIS | 12 | South Lincs | 6:55.31 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Poppy HATHWAY | 12 | Grantham | 6:04.88 |
| 2 | 13 | Reuben OWEN | 13 | South Lincs | 5:36.77 |
| 3 | 15 | Eleanor BIRINY | 13 | Lincoln Vulc | 5:33.00 |
| 4 | 17 | Lexie SHEWAN | 13 | Grantham | 5:30.68 |
| 5 | 16 | Isabella VINTER | 18 | Co Lincoln P | 5:32.35 |
| 6 | 14 | Charlotte TURNER | 13 | Lincoln Vulc | 5:35.81 |
| 7 | 12 | Kieran LUCY | 13 | South Lincs | 5:37.00 |
| 8 | 10 | Sophie BOLTON | 12 | South Lincs | 6:05.35 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Amy TAYLOR | 12 | Grantham | 5:21.32 |
| 2 | 21 | Lucy WILLATTS | 12 | Grantham | 5:00.70 |
| 3 | 23 | Harry VICKERS | 16 | Lincoln Vulc | 4:48.17 |
| 4 | 25 | Owen HATHWAY | 17 | Grantham | 4:17.40 |
| 5 | 24 | Jessica O'HERLIHY | 18 | South Lincs | 4:33.50 |
| 6 | 22 | Isla GRAY | 14 | Grantham | 4:52.67 |
| 7 | 20 | Harriet MCCORMACK | 14 | Grantham | 5:16.45 |
| 8 | 18 | Remi-leigh BERRY | 11 | Co Lincoln P | 5:21.75 |