EVENT 352 Mens Open 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Lucas HAYLES | 15 | Clevedon | 19:01.30 |
| 1 | 2 | Luke BROWN | 16 | Chippenham | 18:58.11 |
| 2 | 3 | Luke OWEN | 15 | Exeter City | 18:52.10 |
| 3 | 4 | Louis CLAYTON | 15 | Poole | 18:50.20 |
| 4 | 5 | Harvie GREENWOOD | 15 | TigersharksW | 18:43.50 |
| 5 | 6 | Codie FOSTER | 16 | Soundwell | 18:39.02 |
| 6 | 7 | Benjamin CUTBUSH | 15 | Poole | 18:38.03 |
| 7 | 8 | Rimae DARLINGTON-EYRE | 15 | Plymouth Lea | 18:36.00 |
| 8 | 9 | Niall CALEY | 16 | Millfield | 18:28.40 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 10 | Tom LEIGH | 16 | Truro City | 18:25.20 |
| 1 | 11 | Jake MOWBRAY | 16 | Yeovil | 18:23.76 |
| 2 | 12 | Robert HALL | 18 | Street | 18:22.30 |
| 3 | 13 | Ben RAWLINS | 17 | Southwold | 18:17.56 |
| 4 | 14 | Freddie ASHLEY-SPARKS | 15 | Plymouth Lea | 18:15.27 |
| 5 | 15 | Maxim HAMLEY | 16 | St Austell A | 18:07.58 |
| 6 | 16 | Jackson SPRY | 16 | Caradon | 18:05.33 |
| 7 | 17 | Sean ROBINSON | 15 | Street | 17:48.03 |
| 8 | 18 | Luke MAUNDER | 25 | Street | 17:47.30 |
| 9 | 19 | Daniel LYFORD | 16 | Carn Brea | 17:47.20 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 20 | Henry BENNETT | 17 | Southwold | 17:46.46 |
| 1 | 21 | James RICHARDSON | 15 | Seagulls SC | 17:45.41 |
| 2 | 22 | Lucas BENNETT | 15 | Co Bristol | 17:44.96 |
| 3 | 23 | Alexander SARGEANT | 15 | Millfield | 17:37.50 |
| 4 | 24 | Jack GIBERT | 16 | Co Bristol | 17:32.70 |
| 5 | 25 | Benjamin PORTER | 20 | Poole | 17:32.02 |
| 6 | 26 | Luke MORGAN | 16 | Swindon Dolp | 17:27.34 |
| 7 | 27 | Ben CARD | 19 | Yeovil | 17:15.20 |
| 8 | 28 | Robert WHITTAKER | 16 | Barnstaple | 17:14.39 |
| 9 | 29 | Chandler SAER | 17 | Team Bath AS | 17:12.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 31 | George FARR | 16 | Co Bristol | 16:49.98 |
| 1 | 33 | Jack WHITE | 17 | Co Bristol | 16:40.70 |
| 2 | 35 | William DAVIES | 17 | Swindon Dolp | 16:22.80 |
| 3 | 37 | Matthew WRIGHT | 19 | Bath Univ | 16:05.69 |
| 4 | 39 | William RYLEY | 19 | Bath Univ | 15:36.55 |
| 5 | 38 | Jakob GOODMAN | 17 | Millfield | 15:37.69 |
| 6 | 36 | Adam DAVIES | 16 | Plymouth Lea | 16:06.39 |
| 7 | 34 | Adam HALL | 16 | Gloucester | 16:30.43 |
| 8 | 32 | Oliver FAIRMAN | 15 | S Bournem'th | 16:48.20 |
| 9 | 30 | William HENDRY | 17 | Millfield | 16:52.25 |