Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Wed 4 Jan 2012 | Harrow | 1 | 1 | Slight |
| Sun 22 Jan 2012 | Three Rivers | 2 | 4 | Slight |
| Fri 27 Jan 2012 | Harrow | 2 | 1 | Slight |
| Tue 31 Jan 2012 | Hertsmere | 3 | 3 | Slight |
| Thu 15 Mar 2012 | Watford | 2 | 1 | Slight |
| Wed 25 Apr 2012 | Watford | 2 | 3 | Serious |
| Mon 4 Jun 2012 | Hertsmere | 1 | 2 | Slight |
| Tue 12 Jun 2012 | Hertsmere | 4 | 1 | Slight |
| Tue 12 Jun 2012 | Hertsmere | 4 | 1 | Slight |
| Sun 17 Jun 2012 | Harrow | 2 | 4 | Slight |
| Tue 19 Jun 2012 | Harrow | 2 | 2 | Slight |
| Fri 22 Jun 2012 | Harrow | 3 | 1 | Slight |
| Sat 21 Jul 2012 | Watford | 1 | 1 | Serious |
| Wed 25 Jul 2012 | Harrow | 2 | 1 | Slight |
| Fri 10 Aug 2012 | Hertsmere | 2 | 2 | Slight |
| Fri 28 Sep 2012 | Hertsmere | 2 | 1 | Slight |
| Fri 28 Sep 2012 | Hertsmere | 2 | 1 | Slight |
| Sat 13 Oct 2012 | Watford | 2 | 1 | Slight |
| Thu 18 Oct 2012 | Three Rivers | 2 | 2 | Slight |
| Sun 28 Oct 2012 | Hertsmere | 3 | 1 | Slight |
| Tue 6 Nov 2012 | Harrow | 2 | 1 | Slight |
| Wed 21 Nov 2012 | Harrow | 2 | 1 | Slight |
| Sat 22 Dec 2012 | Watford | 1 | 1 | Serious |