EVENT 102 Mens Open 1500m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Ahaan SAINI | 15 | Hatfield | 17:58.14 |
| 4 | 3 | Harley WEST | 15 | Basildon Ph | 17:54.50 |
| 5 | 2 | Harry SAUNDERS | 17 | Newmarket | 17:57.25 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 5 | James POPE | 16 | Watford SC | 17:53.40 |
| 3 | 7 | Matthew BROWN | 14 | Stowmarket | 17:42.60 |
| 4 | 9 | Callum STEDMAN | 16 | West Norfolk | 17:33.50 |
| 5 | 8 | Daniel MONK | 15 | Harlow Pen | 17:34.84 |
| 6 | 6 | Zane BATT | 16 | Hoddesdon | 17:51.42 |
| 7 | 4 | Peter SOCZEWKA | 14 | Hatfield | 17:53.76 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 11 | Oskar FARKAS | 14 | Co Cambridge | 17:22.70 |
| 2 | 13 | Joe FLETCHER | 17 | Stowmarket | 17:15.69 |
| 3 | 15 | Daniel ENGLISH | 17 | Bor of Brox | 16:45.00 |
| 4 | 17 | Noah JAMESON NEAL | 15 | Basildon Ph | 16:31.32 |
| 5 | 16 | Owen WEBSTER | 16 | St Felix Sch | 16:31.58 |
| 6 | 14 | George WHITEMAN | 15 | Co Peterboro | 16:53.90 |
| 7 | 12 | Adam EVENS | 17 | Bor of Brox | 17:21.23 |
| 8 | 10 | Ethan SUTTON | 17 | Watford SC | 17:33.17 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 19 | Jude LIDDIARD | 18 | Co St Albans | 16:05.73 |
| 2 | 21 | Henry PEARCE | 17 | Co Peterboro | 15:57.16 |
| 3 | 23 | Joshua FOWLES | 20 | Witham Dolph | 15:54.01 |
| 4 | 25 | Nathan HUGHES | 19 | Hatfield | 14:48.50 |
| 5 | 24 | Jacques BONSELL | 20 | Co Cambridge | 15:39.31 |
| 6 | 22 | Ralph MUNCER | 18 | Co St Albans | 15:55.38 |
| 7 | 20 | Lewis BINNING | 16 | Basildon Ph | 15:59.83 |
| 8 | 18 | Samuel ROSE | 16 | St Felix Sch | 16:22.80 |