EVENT 201 Mixed 12 Yrs/Under 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Harry WILKINSON | 9 | Co Leeds | 7:21.00 |
| 3 | 3 | Evelyn PACE | 10 | Co Leeds | 7:20.00 |
| 4 | 5 | Keaton-James HALL | 12 | Bo Barnsley | 7:00.40 |
| 5 | 4 | Archie DAWSON | 12 | Bo Barnsley | 7:09.70 |
| 6 | 2 | Joel HARRIS | 9 | Co Leeds | 7:20.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 7 | Rumi JEEVA | 9 | Co Leeds | 7:00.00 |
| 2 | 9 | Alexander HUTCHISON | 9 | Co Leeds | 7:00.00 |
| 3 | 11 | Oskar SZAMUK | 11 | Co Leeds | 6:47.30 |
| 4 | 13 | William WINSTANLEY | 10 | Co Leeds | 6:40.00 |
| 5 | 12 | Andre Nicholas ROTARU | 10 | Co Leeds | 6:47.00 |
| 6 | 10 | Luke DARNELL | 9 | Co Leeds | 7:00.00 |
| 7 | 8 | Niamh SUTCLIFFE | 10 | Co Leeds | 7:00.00 |
| 8 | 6 | Paige ROBERTSON | 9 | Co Leeds | 7:00.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 15 | Elizabeth ROTHWELL | 11 | Co Leeds | 6:36.80 |
| 2 | 17 | Alfie CALAM | 9 | Co Leeds | 6:30.00 |
| 3 | 19 | Daisy RASOOL | 10 | Co Leeds | 6:25.00 |
| 4 | 21 | Tobias RAMSDEN | 12 | Co Bradford | 6:18.90 |
| 5 | 20 | Olivia HAN | 10 | Co Leeds | 6:19.94 |
| 6 | 18 | Ryker BOYD | 11 | Co Leeds | 6:27.40 |
| 7 | 16 | Jessica SUTCLIFFE | 9 | Co Leeds | 6:34.00 |
| 8 | 14 | Charlie MACFADYEN | 11 | Co Leeds | 6:39.10 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Jake HARRISON | 10 | Co Leeds | 6:16.20 |
| 2 | 25 | Ruby TALKES | 9 | Lincoln Vulc | 6:14.76 |
| 3 | 27 | Harry TROUSDALE | 12 | Co Leeds | 6:09.60 |
| 4 | 29 | Callum BYRNE | 10 | Bo Barnsley | 6:07.60 |
| 5 | 28 | Reece THOMPSON | 11 | Bo Barnsley | 6:08.92 |
| 6 | 26 | Sienna JONES | 10 | Co Manch Aq | 6:13.60 |
| 7 | 24 | Stella BOWES | 9 | Co Leeds | 6:15.60 |
| 8 | 22 | Matilda DARK | 10 | Co Leeds | 6:16.50 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 31 | Arshak RAHMANI | 12 | Co Leeds | 6:03.70 |
| 2 | 33 | Henry ROLLINGS | 11 | Co Leeds | 5:57.08 |
| 3 | 35 | Fraser GALBRAITH | 11 | Co Leeds | 5:54.03 |
| 4 | 37 | Adam MOHAMED | 10 | Co Leeds | 5:49.40 |
| 5 | 36 | George BEILBY-WOODWARD | 11 | Co Leeds | 5:50.70 |
| 6 | 34 | Isabelle JORDAN | 10 | Co Leeds | 5:56.60 |
| 7 | 32 | Lily HOGAN | 10 | Co Leeds | 6:01.80 |
| 8 | 30 | Isabella HUTCHISON | 10 | Co Leeds | 6:05.90 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 39 | Sophia Xiu Hui KOK | 11 | Co Leeds | 5:48.50 |
| 2 | 41 | Martha NEWMAN | 10 | Co Leeds | 5:43.70 |
| 3 | 43 | Ella HARRISON | 12 | Co Leeds | 5:41.00 |
| 4 | 45 | Zachary HOGG | 12 | Co Bradford | 5:40.38 |
| 5 | 44 | Matilda SHERLEY-PRICE | 10 | Co Leeds | 5:40.40 |
| 6 | 42 | Emma GLOSEK | 11 | Co Leeds | 5:41.60 |
| 7 | 40 | Finley SMITH | 10 | Co Leeds | 5:44.40 |
| 8 | 38 | Ava ALLEN | 10 | Co Leeds | 5:48.50 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 47 | Jacob CAWOOD | 11 | Co Leeds | 5:39.20 |
| 2 | 49 | Isabelle LOK | 11 | Co Leeds | 5:38.80 |
| 3 | 51 | Anneliese CIRSTEA | 10 | Co Leeds | 5:37.70 |
| 4 | 53 | Bobby WALLIS | 12 | Lincoln Vulc | 5:31.95 |
| 5 | 52 | Betsy KIRKLEY | 12 | Co Leeds | 5:36.10 |
| 6 | 50 | Daniel RAWLINGS | 12 | Co Leeds | 5:38.30 |
| 7 | 48 | David MCINTOSH | 9 | Co Leeds | 5:39.00 |
| 8 | 46 | Yin Ho Adrian CHAN | 11 | Co Leeds | 5:40.00 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 55 | Oscar WOOD | 12 | Lincoln Vulc | 5:30.24 |
| 2 | 57 | Anna GLOSEK | 12 | Co Leeds | 5:29.10 |
| 3 | 59 | Francesca SPALDING | 11 | Co Leeds | 5:27.10 |
| 4 | 61 | Oscar CALAM | 12 | Co Leeds | 5:22.23 |
| 5 | 60 | Ayla CARRY | 11 | Co Leeds | 5:26.90 |
| 6 | 58 | Euan CARMODY | 11 | Co Leeds | 5:28.20 |
| 7 | 56 | Margot MARKS | 11 | Lincoln Vulc | 5:30.00 |
| 8 | 54 | Lewis LUNG | 12 | Co Leeds | 5:30.60 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 63 | Isabelle PARK | 11 | Co Leeds | 5:20.10 |
| 2 | 65 | Isla CUNDILL | 12 | Co Leeds | 5:18.10 |
| 3 | 67 | Katie SADLER | 11 | Co Leeds | 5:11.50 |
| 4 | 69 | David GRIGORE | 12 | Co Leeds | 5:08.70 |
| 5 | 68 | Ted WINGFIELD | 11 | Co Leeds | 5:11.20 |
| 6 | 66 | Tyler GREEN | 11 | Co Leeds | 5:12.24 |
| 7 | 64 | Qian SHEN | 11 | Co Leeds | 5:18.90 |
| 8 | 62 | George RICKETTS | 12 | Co Leeds | 5:20.70 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 71 | Evelyn ATKINSON | 11 | Co Leeds | 5:07.00 |
| 2 | 73 | Henry PATTERSON | 11 | Co Leeds | 4:58.00 |
| 3 | 75 | Madeline BECKRAM | 12 | Co Leeds | 4:56.40 |
| 4 | 77 | Zachary WHITTAKER | 12 | Co Leeds | 4:51.40 |
| 5 | 76 | Oliver BARKER | 12 | Co Leeds | 4:51.70 |
| 6 | 74 | Jessica COLLEY | 12 | Co Leeds | 4:57.90 |
| 7 | 72 | Harry DIXON | 12 | Co Leeds | 5:00.80 |
| 8 | 70 | Barney HOBBS | 12 | Co Leeds | 5:07.10 |