| POS | Rank | Heat | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|
| 1 | 1 | 2 | Kirani JAMES |
GRN |
44.85 |
| 2 | 2 | 2 | Chris Brown |
BAH |
44.95 |
| 3 | 3 | 2 | Tony MCQUAY |
USA |
45.00 |
| 4 | 4 | 2 | Nigel Levine |
GBR |
45.27 |
| 5 | 5 | 2 | Jeremy Wariner |
USA |
45.29 |
| 6 | 6 | 2 | Martyn ROONEY |
GBR |
45.31 |
| 7 | 7 | 2 | Tabarie Henry |
ISV |
45.55 |
| 8 | 1 | 1 | Jack Green |
GBR |
45.99 |
| 9 | 8 | 2 | Conrad Williams |
GBR |
46.04 |
| 10 | 2 | 1 | Robert Tobin |
GBR |
46.34 |
| 11 | 3 | 1 | Luke LENNON-FORD |
GBR |
46.37 |
| 12 | 4 | 1 | Jarryd Dunn |
GBR |
46.67 |
| 13 | 5 | 1 | Michael Warner |
GBR |
47.02 |
| 14 | 6 | 1 | Richard Morrissey |
GBR |
47.69 |
| 15 | 7 | 1 | Tom Druce |
GBR |
47.93 |
| 16 | 8 | 1 | Lawrence Wooldridge |
GBR |
48.31 |