Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 23 Jan 2004 | Three Rivers | 2 | 1 | Slight |
| Mon 22 Mar 2004 | Three Rivers | 2 | 1 | Slight |
| Wed 7 Apr 2004 | Three Rivers | 3 | 3 | Slight |
| Wed 28 Apr 2004 | Hillingdon | 2 | 2 | Slight |
| Fri 4 Jun 2004 | Three Rivers | 1 | 1 | Slight |
| Sun 13 Jun 2004 | Watford | 2 | 1 | Slight |
| Fri 2 Jul 2004 | Watford | 2 | 1 | Slight |
| Thu 15 Jul 2004 | Hillingdon | 2 | 1 | Slight |
| Thu 15 Jul 2004 | Watford | 1 | 1 | Slight |
| Mon 2 Aug 2004 | Three Rivers | 2 | 1 | Slight |
| Thu 12 Aug 2004 | Watford | 2 | 3 | Slight |
| Fri 13 Aug 2004 | Watford | 1 | 1 | Serious |
| Sat 14 Aug 2004 | Hillingdon | 3 | 1 | Slight |
| Wed 8 Sep 2004 | Watford | 3 | 1 | Slight |
| Fri 24 Sep 2004 | Three Rivers | 2 | 1 | Slight |
| Mon 27 Sep 2004 | Hillingdon | 2 | 1 | Slight |
| Tue 5 Oct 2004 | Three Rivers | 2 | 1 | Slight |
| Thu 14 Oct 2004 | Watford | 2 | 1 | Slight |
| Mon 18 Oct 2004 | Three Rivers | 1 | 2 | Slight |
| Tue 16 Nov 2004 | Watford | 1 | 1 | Slight |
| Mon 27 Dec 2004 | Watford | 5 | 3 | Slight |