Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 17 Jan 1986 | Welwyn Hatfield | 2 | 1 | Serious |
| Sat 5 Apr 1986 | Welwyn Hatfield | 1 | 2 | Serious |
| Thu 3 Jul 1986 | Welwyn Hatfield | 2 | 1 | Slight |
| Wed 13 Aug 1986 | Welwyn Hatfield | 2 | 1 | Slight |
| Sat 27 Sep 1986 | Welwyn Hatfield | 2 | 2 | Slight |
| Tue 30 Sep 1986 | Welwyn Hatfield | 2 | 2 | Serious |
| Mon 13 Oct 1986 | Welwyn Hatfield | 1 | 1 | Slight |
| Tue 11 Nov 1986 | Welwyn Hatfield | 2 | 1 | Serious |
| Mon 15 Dec 1986 | Welwyn Hatfield | 4 | 1 | Slight |