EVENT 124 Mens 11/14 Yrs 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Luke Thomas | 12 | Bristol Hen | 6:14.82 |
| 2 | 2 | Oliver Butler | 12 | TauntonDeane | 6:14.00 |
| 3 | 3 | Jack Haley | 12 | Marlborough | 6:07.51 |
| 4 | 4 | Joshua Williams | 12 | Dartmoor DA | 6:06.24 |
| 5 | 5 | Adam White | 11 | Millfield | 6:02.60 |
| 6 | 6 | Charlie Meek | 12 | Poole | 6:02.56 |
| 7 | 7 | Alfie Smithson | 12 | TigersharksW | 5:59.81 |
| 8 | 8 | Jack Willis | 12 | Exeter City | 5:58.65 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 9 | Freddie Carter | 12 | Swindon Dolp | 5:57.76 |
| 1 | 10 | Jack Butler | 12 | TauntonDeane | 5:56.67 |
| 2 | 11 | Henry Sheffield | 12 | Cirencester | 5:51.29 |
| 3 | 12 | Stephen Quine | 13 | Blandford | 5:51.22 |
| 4 | 13 | Toby Foster | 13 | Clevedon | 5:50.20 |
| 5 | 14 | Anthony Davies | 13 | Millfield | 5:46.80 |
| 6 | 15 | Max Looker | 12 | Poole | 5:46.60 |
| 7 | 16 | Verner Krynauw | 13 | Millfield | 5:44.36 |
| 8 | 17 | Alex Bridges | 13 | Soundwell | 5:44.29 |
| 9 | 18 | Elliot Wood | 13 | Team Bath AS | 5:42.50 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 19 | Finn Broekhoven | 12 | Plymouth Lea | 5:41.09 |
| 1 | 20 | Lawrence Elliott | 13 | Seagulls SC | 5:39.50 |
| 2 | 21 | Storm Munday | 13 | Millfield | 5:38.05 |
| 3 | 22 | Lorenzo Robertson-Moro | 13 | Exeter City | 5:35.68 |
| 4 | 23 | Magnus Kelly | 13 | Millfield | 5:35.50 |
| 5 | 24 | Jonathan Turck | 12 | Plymouth Lea | 5:35.33 |
| 6 | 25 | Finley Chandler | 13 | Poole | 5:33.84 |
| 7 | 26 | Carter Stuhlmacher | 14 | Poole | 5:33.42 |
| 8 | 27 | Lucas Tompkins | 14 | Severnside | 5:33.38 |
| 9 | 28 | Tyler Hillier | 14 | Swindon Dolp | 5:33.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 29 | Ryan Lawrence | 14 | TigersharksW | 5:30.20 |
| 1 | 30 | Amos Starkey | 13 | Gloucester | 5:27.70 |
| 2 | 31 | Archie Tyers | 14 | Exeter City | 5:27.32 |
| 3 | 32 | James Riach | 14 | Tewkesbury | 5:25.10 |
| 4 | 33 | Oliver Saunders | 13 | Team Bath AS | 5:23.98 |
| 5 | 34 | Samuel Ellis | 13 | Plymouth Lea | 5:23.42 |
| 6 | 35 | Harrison Crook | 14 | Swindon Dolp | 5:23.12 |
| 7 | 36 | Ryan Harper | 14 | S Bournem'th | 5:22.17 |
| 8 | 37 | Ryan Openshaw | 13 | Poole | 5:20.79 |
| 9 | 38 | James Andrew | 14 | TigersharksW | 5:19.40 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 40 | Connor Talbot | 14 | Co Bristol | 5:18.93 |
| 1 | 42 | Harry Polkinghorne | 13 | Truro City | 5:16.28 |
| 2 | 44 | Robbie Hemmings | 14 | Poole | 5:10.38 |
| 3 | 46 | David O'Loughlin | 14 | Millfield | 5:05.00 |
| 4 | 48 | James Hart | 14 | Plymouth Lea | 4:48.42 |
| 5 | 47 | Evan Jones | 14 | Millfield | 5:00.00 |
| 6 | 45 | Farran Gregory | 14 | TauntonDeane | 5:06.56 |
| 7 | 43 | Ethan Philipson | 14 | Plymouth Lea | 5:14.80 |
| 8 | 41 | William Cooper | 14 | Gloucester | 5:16.43 |
| 9 | 39 | Oscar Barlow | 13 | TauntonDeane | 5:19.00 |