Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 10 Jan 1986 | Hertsmere | 2 | 1 | Slight |
| Fri 31 Jan 1986 | Hertsmere | 1 | 2 | Slight |
| Thu 6 Feb 1986 | Hertsmere | 2 | 1 | Slight |
| Wed 26 Feb 1986 | Hertsmere | 2 | 1 | Slight |
| Sun 9 Mar 1986 | Hertsmere | 1 | 1 | Slight |
| Tue 1 Apr 1986 | Hertsmere | 1 | 1 | Slight |
| Thu 10 Apr 1986 | Hertsmere | 1 | 1 | Slight |
| Wed 7 May 1986 | Hertsmere | 1 | 1 | Slight |
| Fri 16 May 1986 | Hertsmere | 1 | 1 | Slight |
| Sun 18 May 1986 | Hertsmere | 1 | 1 | Serious |
| Fri 23 May 1986 | Hertsmere | 2 | 1 | Slight |
| Thu 29 May 1986 | Hertsmere | 1 | 1 | Slight |
| Wed 18 Jun 1986 | Hertsmere | 2 | 1 | Slight |
| Tue 24 Jun 1986 | Hertsmere | 1 | 1 | Serious |
| Fri 27 Jun 1986 | Hertsmere | 2 | 1 | Slight |
| Tue 5 Aug 1986 | Hertsmere | 3 | 1 | Slight |
| Mon 11 Aug 1986 | Hertsmere | 3 | 2 | Slight |
| Mon 11 Aug 1986 | Hertsmere | 3 | 2 | Slight |
| Thu 21 Aug 1986 | Hertsmere | 1 | 1 | Slight |
| Tue 26 Aug 1986 | Hertsmere | 1 | 1 | Slight |
| Mon 8 Sep 1986 | Hertsmere | 2 | 1 | Slight |
| Wed 10 Sep 1986 | Hertsmere | 2 | 1 | Slight |
| Thu 11 Sep 1986 | Hertsmere | 3 | 1 | Slight |
| Mon 29 Sep 1986 | Hertsmere | 1 | 1 | Slight |
| Wed 1 Oct 1986 | Hertsmere | 2 | 1 | Slight |
| Mon 13 Oct 1986 | Hertsmere | 2 | 1 | Slight |
| Wed 22 Oct 1986 | Hertsmere | 2 | 1 | Slight |
| Thu 23 Oct 1986 | Hertsmere | 2 | 1 | Slight |
| Wed 29 Oct 1986 | Hertsmere | 1 | 1 | Slight |
| Fri 31 Oct 1986 | Hertsmere | 2 | 1 | Slight |
| Sat 1 Nov 1986 | Hertsmere | 2 | 1 | Slight |
| Thu 6 Nov 1986 | Hertsmere | 2 | 1 | Slight |
| Fri 21 Nov 1986 | Hertsmere | 3 | 1 | Slight |
| Mon 24 Nov 1986 | Hertsmere | 1 | 1 | Serious |
| Thu 27 Nov 1986 | Hertsmere | 2 | 1 | Slight |
| Mon 1 Dec 1986 | Hertsmere | 2 | 2 | Slight |
| Tue 9 Dec 1986 | Hertsmere | 1 | 1 | Serious |
| Wed 10 Dec 1986 | Hertsmere | 1 | 1 | Slight |
| Wed 17 Dec 1986 | Hertsmere | 2 | 1 | Slight |