Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 7 Jan 2011 | Hillingdon | 1 | 1 | Serious |
| Wed 12 Jan 2011 | Watford | 2 | 1 | Slight |
| Thu 27 Jan 2011 | Three Rivers | 2 | 2 | Slight |
| Sat 5 Feb 2011 | Three Rivers | 2 | 2 | Slight |
| Sun 13 Feb 2011 | Hillingdon | 2 | 2 | Serious |
| Fri 4 Mar 2011 | Three Rivers | 2 | 1 | Slight |
| Mon 25 Apr 2011 | Hillingdon | 2 | 1 | Slight |
| Sun 8 May 2011 | Three Rivers | 2 | 1 | Slight |
| Wed 25 May 2011 | Watford | 2 | 3 | Slight |
| Sun 12 Jun 2011 | Three Rivers | 2 | 4 | Serious |
| Wed 29 Jun 2011 | Watford | 1 | 1 | Slight |
| Sat 2 Jul 2011 | Hillingdon | 2 | 1 | Slight |
| Fri 8 Jul 2011 | Watford | 2 | 1 | Slight |
| Wed 3 Aug 2011 | Watford | 2 | 2 | Slight |
| Sat 10 Sep 2011 | Watford | 2 | 1 | Slight |
| Fri 30 Sep 2011 | Watford | 2 | 1 | Slight |
| Tue 18 Oct 2011 | Three Rivers | 2 | 1 | Slight |
| Fri 2 Dec 2011 | Hertsmere | 2 | 1 | Slight |
| Wed 21 Dec 2011 | Watford | 3 | 1 | Slight |