EVENT 124 Mens 400m IM - Heats
Not Competing : 13
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Matteo TONTODONATI | 15 | Hoddesdon | 5:26.04 |
| 4 | 3 | Lewis BAYLEY | 15 | Southend | 5:12.52 |
| 5 | 2 | George HART | 15 | Mid Beds | 5:13.72 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 5 | Jack RICHES | 15 | UEA Norwich | DN:C . |
| 2 | 7 | Luke CROFTS | 16 | Thurrock | 5:15.66 |
| 3 | 9 | John TELENSKY | 15 | Harpenden | 5:19.47 |
| 4 | 11 | Taylor BOWEN | 15 | West Suffolk | 5:13.71 |
| 5 | 10 | Harrison LEES | 15 | Watford SC | 5:12.18 |
| 6 | 8 | James BAYLEY | 16 | Basildon Ph | 5:23.64 |
| 7 | 6 | Maxim DE WILDT | 15 | Co Cambridge | 5:11.39 |
| 8 | 4 | James CHENNELLS | 15 | Berkhamsted | 5:14.65 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 14 | Cole JAMES | 15 | Hatfield | 5:03.76 |
| 2 | 16 | Max WILSON | 16 | Modernians | 4:58.12 |
| 3 | 18 | Harry WHITEMAN | 16 | Co Peterboro | 4:56.83 |
| 4 | 20 | Myles TURNER | 16 | West Suffolk | 4:49.03 |
| 5 | 19 | Spencer PRIOR | 17 | Colchester | 5:01.79 |
| 6 | 17 | Jamie MCCAFFRAY | 15 | Modernians | 4:57.73 |
| 7 | 15 | James MCFARLAND | 15 | Mid Beds | 5:06.80 |
| 8 | 12 | Harry NICHOLLS | 16 | Basildon Ph | 5:03.52 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 22 | James WOODWARD | 16 | Potters Bar | 4:51.86 |
| 2 | 24 | Harvey NORMAN | 15 | Co Peterboro | 4:52.60 |
| 3 | 26 | Jack PICKERING | 18 | teamipswich | 4:52.60 |
| 4 | 28 | Ryan KELLY | 17 | Chelmsford | 4:52.66 |
| 5 | 27 | Thomas SARAH | 22 | Co Cambridge | 4:50.13 |
| 6 | 25 | Charles RAYNER | 15 | Hatfield | 4:51.94 |
| 7 | 23 | Finlay RYAN | 17 | Norwich Swan | 4:59.15 |
| 8 | 21 | Alexander MASON | 20 | Team Luton | 5:02.61 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 30 | Samuel PECK | 16 | UEA Norwich | 4:50.49 |
| 2 | 32 | Fraser SCOTT | 18 | Basildon Ph | 4:47.85 |
| 3 | 34 | Joshua GRAVES | 19 | Co Peterboro | 4:48.33 |
| 4 | 36 | Nathan WELLS | 18 | West Norfolk | 4:42.30 |
| 5 | 35 | Augustus VEASEY | 20 | Chelmsford | 4:44.77 |
| 6 | 33 | Thomas MCLAGAN | 20 | Chelmsford | 4:44.48 |
| 7 | 31 | Cameron MCRAE | 17 | Co Peterboro | 4:49.22 |
| 8 | 29 | Calvin COE | 18 | Stowmarket | 4:59.35 |