Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 3 Jan 1986 | Harrow | 1 | 1 | Slight |
| Sat 4 Jan 1986 | Harrow | 1 | 1 | Slight |
| Wed 15 Jan 1986 | Harrow | 2 | 1 | Slight |
| Tue 21 Jan 1986 | Harrow | 2 | 1 | Slight |
| Tue 21 Jan 1986 | Harrow | 2 | 1 | Slight |
| Sun 26 Jan 1986 | Harrow | 2 | 1 | Slight |
| Mon 27 Jan 1986 | Harrow | 2 | 1 | Slight |
| Tue 28 Jan 1986 | Harrow | 2 | 1 | Slight |
| Thu 6 Feb 1986 | Harrow | 1 | 1 | Slight |
| Thu 6 Feb 1986 | Harrow | 2 | 1 | Slight |
| Fri 7 Feb 1986 | Harrow | 2 | 2 | Slight |
| Thu 13 Feb 1986 | Harrow | 1 | 1 | Serious |
| Mon 17 Feb 1986 | Harrow | 2 | 1 | Slight |
| Fri 21 Feb 1986 | Harrow | 2 | 1 | Slight |
| Fri 14 Mar 1986 | Harrow | 1 | 1 | Slight |
| Thu 20 Mar 1986 | Harrow | 1 | 1 | Slight |
| Mon 24 Mar 1986 | Harrow | 2 | 1 | Slight |
| Wed 26 Mar 1986 | Harrow | 2 | 1 | Slight |
| Thu 3 Apr 1986 | Harrow | 1 | 1 | Slight |
| Thu 3 Apr 1986 | Harrow | 2 | 2 | Slight |
| Mon 14 Apr 1986 | Harrow | 1 | 2 | Slight |
| Sun 20 Apr 1986 | Harrow | 1 | 1 | Slight |
| Wed 23 Apr 1986 | Harrow | 2 | 2 | Slight |
| Tue 29 Apr 1986 | Harrow | 1 | 1 | Serious |
| Sat 10 May 1986 | Harrow | 2 | 1 | Slight |
| Sat 24 May 1986 | Harrow | 1 | 1 | Slight |
| Wed 28 May 1986 | Harrow | 1 | 1 | Slight |
| Fri 30 May 1986 | Harrow | 2 | 1 | Slight |
| Tue 3 Jun 1986 | Harrow | 2 | 3 | Slight |
| Sat 7 Jun 1986 | Barnet | 2 | 1 | Slight |
| Tue 10 Jun 1986 | Harrow | 2 | 1 | Slight |
| Thu 12 Jun 1986 | Harrow | 1 | 1 | Slight |
| Sun 15 Jun 1986 | Harrow | 2 | 1 | Slight |
| Fri 20 Jun 1986 | Harrow | 3 | 1 | Slight |
| Sat 21 Jun 1986 | Harrow | 1 | 1 | Slight |
| Mon 23 Jun 1986 | Harrow | 2 | 2 | Serious |
| Thu 3 Jul 1986 | Harrow | 2 | 1 | Slight |
| Thu 3 Jul 1986 | Harrow | 2 | 1 | Slight |
| Thu 3 Jul 1986 | Harrow | 2 | 1 | Slight |
| Fri 4 Jul 1986 | Harrow | 1 | 1 | Slight |
| Wed 9 Jul 1986 | Harrow | 2 | 1 | Slight |
| Wed 9 Jul 1986 | Harrow | 3 | 1 | Slight |
| Thu 10 Jul 1986 | Harrow | 2 | 1 | Slight |
| Thu 17 Jul 1986 | Harrow | 2 | 1 | Slight |
| Fri 18 Jul 1986 | Harrow | 2 | 1 | Slight |
| Fri 18 Jul 1986 | Harrow | 2 | 1 | Slight |
| Tue 29 Jul 1986 | Harrow | 1 | 1 | Serious |
| Sun 10 Aug 1986 | Harrow | 2 | 1 | Slight |
| Thu 21 Aug 1986 | Harrow | 3 | 1 | Slight |
| Fri 22 Aug 1986 | Harrow | 2 | 1 | Slight |
| Sun 7 Sep 1986 | Harrow | 2 | 1 | Slight |
| Tue 9 Sep 1986 | Harrow | 1 | 1 | Serious |
| Fri 12 Sep 1986 | Harrow | 2 | 1 | Slight |
| Mon 15 Sep 1986 | Harrow | 2 | 1 | Slight |
| Tue 16 Sep 1986 | Barnet | 1 | 1 | Serious |
| Thu 18 Sep 1986 | Harrow | 2 | 1 | Serious |
| Fri 19 Sep 1986 | Harrow | 1 | 1 | Serious |
| Mon 22 Sep 1986 | Harrow | 2 | 1 | Slight |
| Mon 22 Sep 1986 | Harrow | 2 | 1 | Slight |
| Tue 30 Sep 1986 | Harrow | 2 | 1 | Slight |
| Tue 30 Sep 1986 | Harrow | 2 | 1 | Serious |
| Tue 30 Sep 1986 | Harrow | 2 | 3 | Slight |
| Fri 3 Oct 1986 | Harrow | 2 | 3 | Slight |
| Sat 4 Oct 1986 | Barnet | 2 | 2 | Slight |
| Sun 5 Oct 1986 | Harrow | 1 | 1 | Serious |
| Mon 6 Oct 1986 | Harrow | 1 | 1 | Slight |
| Wed 15 Oct 1986 | Harrow | 2 | 1 | Slight |
| Wed 15 Oct 1986 | Harrow | 1 | 1 | Slight |
| Mon 20 Oct 1986 | Barnet | 2 | 2 | Slight |
| Thu 30 Oct 1986 | Barnet | 2 | 1 | Slight |
| Fri 31 Oct 1986 | Harrow | 2 | 1 | Slight |
| Tue 4 Nov 1986 | Harrow | 1 | 1 | Slight |
| Thu 6 Nov 1986 | Harrow | 2 | 1 | Slight |
| Sat 8 Nov 1986 | Harrow | 3 | 1 | Slight |
| Sun 9 Nov 1986 | Harrow | 2 | 1 | Slight |
| Mon 10 Nov 1986 | Harrow | 1 | 1 | Slight |
| Wed 12 Nov 1986 | Harrow | 1 | 1 | Slight |
| Fri 14 Nov 1986 | Harrow | 2 | 1 | Slight |
| Mon 17 Nov 1986 | Harrow | 1 | 1 | Slight |
| Sun 23 Nov 1986 | Harrow | 2 | 2 | Slight |
| Thu 27 Nov 1986 | Harrow | 1 | 1 | Serious |
| Fri 28 Nov 1986 | Harrow | 2 | 1 | Slight |
| Sun 7 Dec 1986 | Harrow | 1 | 1 | Slight |
| Wed 10 Dec 1986 | Harrow | 2 | 1 | Slight |
| Thu 18 Dec 1986 | Harrow | 1 | 1 | Slight |
| Sun 21 Dec 1986 | Harrow | 1 | 1 | Slight |