Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Wed 18 Feb 2004 | Welwyn Hatfield | 1 | 1 | Serious |
| Fri 20 Feb 2004 | Barrow-in-Furness | 2 | 1 | Slight |
| Tue 9 Mar 2004 | East Hertfordshire | 1 | 1 | Serious |
| Sat 13 Mar 2004 | Welwyn Hatfield | 2 | 2 | Slight |
| Sat 13 Mar 2004 | Welwyn Hatfield | 2 | 2 | Slight |
| Tue 23 Mar 2004 | Welwyn Hatfield | 2 | 2 | Slight |
| Tue 30 Mar 2004 | East Hertfordshire | 2 | 2 | Slight |
| Mon 5 Apr 2004 | East Hertfordshire | 3 | 2 | Slight |
| Fri 4 Jun 2004 | Welwyn Hatfield | 2 | 3 | Slight |
| Fri 4 Jun 2004 | Welwyn Hatfield | 2 | 3 | Slight |
| Sat 4 Sep 2004 | East Hertfordshire | 1 | 1 | Slight |
| Thu 14 Oct 2004 | East Hertfordshire | 2 | 2 | Fatal |
| Thu 21 Oct 2004 | East Hertfordshire | 2 | 1 | Serious |
| Mon 25 Oct 2004 | East Hertfordshire | 1 | 1 | Slight |
| Thu 9 Dec 2004 | East Hertfordshire | 3 | 3 | Slight |