400 meter Sen Men, Heat:3 of 5 ; Official result since 15:26
| Rank | Lane | ID | Name | SB | Team | Cat | Result | Info | Video |
| 1 | 6 | 60 | MORRISSEY Richard | Crusaders A.C. | Sen | 48.84 | q | ||
| 2 | 5 | 278 | UPTON Barry | Menapians A.C. | Sen | 50.84 | |||
| 3 | 4 | 124 | ENNIS Nick | Crusaders A.C. | Sen | 51.44 | |||
| 4 | 3 | 231 | SCULLY Owen | St. L. O'Toole A.C. | Sen | 52.90 | |||
| 5 | 2 | 76 | GRAHAM David | Lagan Valley AC | Sen | 57.49 |