400 meter Sen Men, Heat:4 of 5 ; Official result since 15:26
| Rank | Lane | ID | Name | SB | Team | Cat | Result | Info | Video |
| 1 | 6 | 151 | WOODS Curtis | North Down AC | Sen | 49.81 | q | ||
| 2 | 4 | 163 | O'SULLIVAN Thomas | Leevale A.C. | Sen | 50.45 | q | ||
| 3 | 3 | 226 | O'CONNOR Art | Emerald A.C. | Sen | 53.55 | |||
| 5 | 74 | BRACKEN-PRICE Conor | Naas A.C. | Sen | DNS |