EVENT 202 Open/Male 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 59 | Thomas GARDLEY | 17 | | RichmondDale | 5::00..6 |
| 1 | 2 | Daniel TEW | 13 | | York City | 5:00.60 |
| 2 | 4 | Jacob IRVING | 13 | | Co Liverpool | 4:59.37 |
| 3 | 6 | Oliver BARRETT | 13 | | Co Leeds | 4:58.50 |
| 4 | 8 | Samuel LEE | 14 | | Trafford Met | 4:56.20 |
| 5 | 7 | Charlie BISBY | 13 | | South Lincs | 4:57.30 |
| 6 | 5 | William DUNN | 13 | | Co Leeds | 4:58.66 |
| 7 | 3 | William BREARTON | 13 | | Wirral Metro | 5:00.40 |
| 8 | 1 | Harry DENWOOD | 14 | | Rotherham Mo | 5:10.30 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 9 | Sebastian CALVER | 14 | | Anaconda | 4:51.60 |
| 1 | 11 | Dexter WOODWARD | 15 | | Co Bradford | 4:50.76 |
| 2 | 13 | William KERSHAW | 14 | | Blackpool Aq | 4:49.14 |
| 3 | 15 | Oliver KEENS | 15 | | Rotherham Mo | 4:48.61 |
| 4 | 17 | Ewan LEONARD | 15 | | Conwy | 4:48.10 |
| 5 | 16 | Jacob O'DONNELL | 14 | | Co Leeds | 4:48.38 |
| 6 | 14 | Owen CARMODY | 14 | | Co Leeds | 4:48.63 |
| 7 | 12 | Gabriel BARNETT | 13 | | Blackpool Aq | 4:49.70 |
| 8 | 10 | William KITE | 15 | | Louth | 4:51.40 |
| 9 | 27 | Lucas LEE | 17 | S14 | Donc Dartes | 4:54.60 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 19 | Jackson CLARKE | 14 | | Co Leeds | 4:46.58 |
| 1 | 21 | Mateo MARINOV | 15 | | Stocksbridge | 4:45.68 |
| 2 | 23 | Layton ANNISON-SNOWDEN | 15 | | Louth | 4:43.60 |
| 3 | 25 | Ethan MAYLOR | 15 | | Wigan BEST | 4:38.90 |
| 4 | 28 | Dominic WORKMAN | 15 | | Co Liverpool | 4:35.94 |
| 5 | 26 | Theo SWANN | 14 | | Rotherham Mo | 4:37.58 |
| 6 | 24 | Daniel BARTON | 14 | | Wigan BEST | 4:41.90 |
| 7 | 22 | Benjamin GLAISTER | 15 | | RichmondDale | 4:45.20 |
| 8 | 20 | James THOMSON | 15 | | Co Leeds | 4:46.10 |
| 9 | 18 | Aidan WILSON | 15 | | Conwy | 4:48.03 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 30 | Hayden LAM | 14 | | Co Leeds | 4:35.41 |
| 1 | 32 | Ethan COWELL | 15 | | Co Leeds | 4:34.90 |
| 2 | 34 | Matthew SAWERS | 15 | | Wigan BEST | 4:33.73 |
| 3 | 36 | Oliver LAMBERT | 15 | | Co Liverpool | 4:32.70 |
| 4 | 38 | Arthur OWENS | 15 | | Co Leeds | 4:32.25 |
| 5 | 37 | Zac BAUGHAN-WITHINGTON | 14 | | KingstonHull | 4:32.30 |
| 6 | 35 | Connor MCCULLEN | 14 | | Co Leeds | 4:33.51 |
| 7 | 33 | Lucas CHRISTIE | 14 | | KingstonHull | 4:34.40 |
| 8 | 31 | Samuel HILL | 15 | | Co Leeds | 4:35.13 |
| 9 | 29 | Luke HORTON | 17 | | Carnforth | 4:35.53 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 41 | Luke KAVANAGH | 16 | | Wirral Metro | 4:31.20 |
| 1 | 45 | Charlie HINSON | 16 | | Co Leeds | 4:27.21 |
| 2 | 49 | Alexander TEW | 15 | | York City | 4:22.49 |
| 3 | 53 | Matthew JUST | 16 | | Co Leeds | 4:20.11 |
| 4 | 57 | Ethan POTTER | 16 | | Co Sheffield | 4:13.40 |
| 5 | 55 | Jack PRITCHARD | 17 | | Wigan BEST | 4:16.39 |
| 6 | 51 | Oscar GOLDSMITH | 16 | | South Lincs | 4:20.70 |
| 7 | 47 | Alex SADLER | 17 | | South Lincs | 4:22.90 |
| 8 | 43 | Joshua BOOTH | 16 | | Rotherham Mo | 4:28.69 |
| 9 | 39 | William WILSON | 14 | | Co Leeds | 4:32.02 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 42 | Oscar GAVELLE | 15 | | Rotherham Mo | 4:30.20 |
| 1 | 46 | Luke DYER | 17 | | Co Leeds | 4:27.01 |
| 2 | 50 | Dawid NAGLIK | 16 | | Co Bradford | 4:21.70 |
| 3 | 54 | Patrick NEILL | 16 | | Co Leeds | 4:19.46 |
| 4 | 58 | Daniel POLLARD | 19 | | KingstonHull | 4:12.80 |
| 5 | 56 | Dylan MADICAN | 15 | | Co Liverpool | 4:15.10 |
| 6 | 52 | Joseph PICKERING | 17 | | KingstonHull | 4:20.30 |
| 7 | 48 | Joseph HALL | 16 | | Co Leeds | 4:22.63 |
| 8 | 44 | Matthew JAMES | 16 | | Co Leeds | 4:27.70 |
| 9 | 40 | Sean FLANAGAN | 17 | | Co Liverpool | 4:31.40 |