400m Men Heats, Heat:2 of 8 ; Official result since 14:43
David Gillick 45.52 (2007)
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 6 | 2 | LENNON-FORD Luke | Clonliffe Harriers A.C. | 47.89 | q | |||
| 2 | 3 | 297 | PENDER Jamie | St Abbans A.C | 50.13 | ||||
| 3 | 5 | 192 | WILSON Conor | Menapians A.C. | 51.14 | ||||
| 4 | 4 | 199 | FLANAGAN Sean | Tallaght A.C. | 51.43 | ||||
| 5 | 2 | 348 | MCELGUNN Cathal | Carrick-on-Shannon A.C. | 52.41 |