EVENT 415 Mens 400m Freestyle - Heats
Not Competing : 28,49
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Sam TOWNSEND | 12 | Biggleswade | 5:12.34 |
| 4 | 3 | Joab CARR | 12 | St Felix Sch | 5:10.23 |
| 5 | 2 | Jenson HURRELL | 11 | Thurrock | 5:11.90 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 5 | Jimmy TAYLOR | 12 | Thurrock | 5:07.80 |
| 2 | 7 | Max MCAULIFFE | 12 | Harlow Pen | 5:03.30 |
| 3 | 9 | Robert ADDIS | 12 | West Norfolk | 5:01.04 |
| 4 | 11 | Edward MCFARLAND | 13 | Mid Beds | 5:00.10 |
| 5 | 10 | Harrison RIDER | 12 | Basildon Ph | 5:01.00 |
| 6 | 8 | Jude HILLS | 11 | Bo Southend | 5:01.70 |
| 7 | 6 | Matthew PRINCE | 12 | Bo Southend | 5:06.60 |
| 8 | 4 | Noah CORNWELL | 12 | Potters Bar | 5:08.10 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 13 | Samuel STEPHENS | 13 | St Felix Sch | 4:59.16 |
| 2 | 15 | Thomas BELCHER | 13 | Modernian | 4:57.00 |
| 3 | 17 | Edward JEX | 13 | Co St Albans | 4:54.43 |
| 4 | 19 | Callum STEDMAN | 13 | Dereham | 4:54.34 |
| 5 | 18 | Daniel WHITE | 13 | St Felix Sch | 4:54.40 |
| 6 | 16 | Michael KLIMASZEWSKI | 12 | Hatfield | 4:56.88 |
| 7 | 14 | Joe COOPER | 12 | teamipswich | 4:58.45 |
| 8 | 12 | Rhys DAVIDSON | 12 | Team Luton | 4:59.50 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 21 | Matthew NEWSON | 13 | Co Peterboro | 4:53.43 |
| 2 | 23 | Marco TONTODONATI | 13 | Hoddesdon | 4:52.07 |
| 3 | 25 | Maxwell GEORGE | 13 | Hatfield | 4:50.40 |
| 4 | 27 | Jack TURRELL | 13 | Basildon Ph | 4:47.65 |
| 5 | 26 | Luke BARTON | 12 | UEA Norwich | 4:49.54 |
| 6 | 24 | Alfie KING | 13 | Thetford | 4:51.49 |
| 7 | 22 | Freddie LAWS | 13 | West Norfolk | 4:52.82 |
| 8 | 20 | Nathan COCKCROFT | 13 | Bo Southend | 4:53.90 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 30 | Tanin KURSIDIM | 14 | Co St Albans | 4:45.60 |
| 2 | 32 | Oliver REEK | 14 | UEA Norwich | 4:44.73 |
| 3 | 34 | Thomas CADENHEAD | 14 | Co St Albans | 4:43.55 |
| 4 | 36 | Timothy HUGHES | 14 | Hatfield | 4:43.47 |
| 5 | 35 | Henry NEWELL | 13 | Newmarket | 4:43.55 |
| 6 | 33 | Ben PARADISE | 14 | Basildon Ph | 4:44.06 |
| 7 | 31 | James SPEERS | 13 | Thurrock | 4:44.90 |
| 8 | 29 | Chester LEEMING | 12 | St Felix Sch | 4:46.42 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 38 | Ewan STURGEON | 14 | Chelmsford | 4:43.00 |
| 2 | 40 | Matthew ROTHWELL | 14 | Co Peterboro | 4:39.19 |
| 3 | 42 | Cameron WOLSTENCROFT | 13 | Co Cambridge | 4:38.10 |
| 4 | 44 | Herbie KINDER | 14 | Co Peterboro | 4:33.06 |
| 5 | 43 | Ben BLOWERS | 14 | UEA Norwich | 4:37.27 |
| 6 | 41 | Harvey SKELLERN | 14 | Co Cambridge | 4:38.50 |
| 7 | 39 | Finn JEFFERY | 13 | St Felix Sch | 4:41.05 |
| 8 | 37 | Ish RAHIM | 14 | Berkhamsted | 4:43.07 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 46 | Joshua BRISTOW | 14 | Modernian | 4:31.61 |
| 2 | 48 | Henry PEARCE | 14 | Co Peterboro | 4:29.30 |
| 3 | 51 | Lewis MOORE | 14 | Deben | 4:23.21 |
| 4 | 53 | Reese HOUSDEN | 14 | Hatfield | 4:12.40 |
| 5 | 52 | Myles ROBINSON-YOUNG | 14 | Co Peterboro | 4:22.50 |
| 6 | 50 | Ayotobi LAGUDA | 14 | Hatfield | 4:25.62 |
| 7 | 47 | Owen WEBSTER | 13 | St Felix Sch | 4:31.40 |
| 8 | 45 | Benjamin HARVEY | 14 | Basildon Ph | 4:33.00 |