EVENT 137 Mens Open 400m Individual Medley - Heats
Not Competing : 21
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Benjamin Staig | 13 | Kelly Coll | 5:20.42 |
| 4 | 3 | Adam Chillingworth | 15 | Street | 5:15.71 |
| 5 | 2 | Chris Wilson | 16 | TauntonDeane | 5:18.37 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 5 | Thomas Normington | 15 | Plymouth Lea | 5:14.20 |
| 2 | 7 | Alexander Raw | 13 | Plymouth Lea | 5:09.91 |
| 3 | 9 | Thomas Shorey | 17 | Penzance | 5:07.90 |
| 4 | 11 | Mathew Sambrook | 16 | Swindon Dolp | 4:59.53 |
| 5 | 10 | Adam Coleman | 15 | Swindon Dolp | 5:00.48 |
| 6 | 8 | Tom Jones | 17 | Clevedon | 5:08.41 |
| 7 | 6 | Samuel Dinham | 14 | Plymouth Lea | 5:13.87 |
| 8 | 4 | Sam Thomas | 18 | Clevedon | 5:14.20 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 13 | Christopher Lee | 18 | Plymouth Lea | 4:54.21 |
| 2 | 15 | Connor Connell | 15 | Plymouth Lea | 4:51.89 |
| 3 | 17 | Mikhail Umnov | 15 | Plymouth Lea | 4:51.82 |
| 4 | 19 | Maximillian Forstenhae | 15 | Plymouth Lea | 4:50.03 |
| 5 | 18 | Edward Walsh | 15 | Severnside | 4:50.60 |
| 6 | 16 | Rhys Cole | 16 | TauntonDeane | 4:51.82 |
| 7 | 14 | Daniel Graaf | 17 | Plymouth Lea | 4:52.82 |
| 8 | 12 | Jacob Greenow | 13 | TauntonDeane | 4:58.70 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 22 | James Wilson | 15 | Plymouth Lea | 4:47.03 |
| 2 | 24 | Neil Redman | 18 | Bath Univ | 4:40.96 |
| 3 | 26 | Reece Worth | 16 | Plymouth Lea | 4:39.40 |
| 4 | 28 | Fraser Minnican | 17 | Millfield | 4:18.70 |
| 5 | 27 | Thomas McLagan | 16 | Kelly Coll | 4:37.50 |
| 6 | 25 | Joel Knight | 17 | Millfield | 4:39.86 |
| 7 | 23 | Samuel Jackson | 18 | Exeter City | 4:44.90 |
| 8 | 20 | Geoffrey Butler | 16 | Plymouth Lea | 4:49.21 |