Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Wed 1 Jan 1986 | Harrow | 2 | 1 | Slight |
| Sat 4 Jan 1986 | Harrow | 1 | 1 | Slight |
| Sun 5 Jan 1986 | Harrow | 1 | 1 | Slight |
| Wed 8 Jan 1986 | Harrow | 1 | 1 | Slight |
| Thu 16 Jan 1986 | Harrow | 2 | 1 | Serious |
| Sat 18 Jan 1986 | Harrow | 1 | 1 | Slight |
| Sun 19 Jan 1986 | Harrow | 2 | 1 | Slight |
| Tue 21 Jan 1986 | Harrow | 1 | 1 | Slight |
| Fri 24 Jan 1986 | Harrow | 1 | 1 | Slight |
| Fri 24 Jan 1986 | Harrow | 2 | 1 | Slight |
| Fri 31 Jan 1986 | Harrow | 2 | 1 | Slight |
| Fri 7 Feb 1986 | Harrow | 2 | 1 | Slight |
| Wed 12 Feb 1986 | Harrow | 4 | 1 | Slight |
| Thu 13 Feb 1986 | Harrow | 1 | 1 | Slight |
| Fri 14 Feb 1986 | Brent | 1 | 2 | Slight |
| Sat 15 Feb 1986 | Harrow | 1 | 1 | Serious |
| Thu 27 Feb 1986 | Harrow | 1 | 1 | Slight |
| Sat 15 Mar 1986 | Harrow | 1 | 1 | Slight |
| Sun 16 Mar 1986 | Harrow | 2 | 1 | Slight |
| Sat 29 Mar 1986 | Harrow | 2 | 1 | Slight |
| Wed 2 Apr 1986 | Harrow | 2 | 1 | Slight |
| Thu 3 Apr 1986 | Harrow | 1 | 1 | Slight |
| Thu 3 Apr 1986 | Harrow | 1 | 1 | Slight |
| Wed 16 Apr 1986 | Harrow | 2 | 1 | Slight |
| Fri 18 Apr 1986 | Harrow | 1 | 1 | Slight |
| Wed 30 Apr 1986 | Harrow | 2 | 1 | Slight |
| Mon 12 May 1986 | Harrow | 1 | 1 | Slight |
| Tue 13 May 1986 | Harrow | 2 | 1 | Slight |
| Sun 18 May 1986 | Harrow | 1 | 1 | Slight |
| Mon 19 May 1986 | Harrow | 1 | 1 | Slight |
| Fri 30 May 1986 | Harrow | 1 | 1 | Serious |
| Fri 6 Jun 1986 | Harrow | 1 | 1 | Slight |
| Wed 11 Jun 1986 | Harrow | 3 | 1 | Slight |
| Mon 23 Jun 1986 | Harrow | 1 | 1 | Slight |
| Sat 28 Jun 1986 | Harrow | 1 | 2 | Slight |
| Sat 28 Jun 1986 | Harrow | 2 | 1 | Serious |
| Wed 2 Jul 1986 | Harrow | 2 | 2 | Slight |
| Fri 4 Jul 1986 | Harrow | 1 | 1 | Slight |
| Tue 8 Jul 1986 | Harrow | 1 | 1 | Serious |
| Tue 8 Jul 1986 | Harrow | 2 | 1 | Slight |
| Fri 11 Jul 1986 | Harrow | 1 | 1 | Slight |
| Fri 11 Jul 1986 | Harrow | 2 | 2 | Slight |
| Tue 15 Jul 1986 | Harrow | 1 | 1 | Slight |
| Thu 17 Jul 1986 | Harrow | 2 | 1 | Fatal |
| Fri 25 Jul 1986 | Hertsmere | 2 | 1 | Slight |
| Wed 30 Jul 1986 | Harrow | 2 | 2 | Slight |
| Mon 4 Aug 1986 | Harrow | 2 | 1 | Slight |
| Wed 6 Aug 1986 | Harrow | 2 | 1 | Slight |
| Sun 10 Aug 1986 | Harrow | 2 | 1 | Slight |
| Sun 10 Aug 1986 | Harrow | 2 | 1 | Slight |
| Thu 14 Aug 1986 | Harrow | 3 | 2 | Slight |
| Mon 18 Aug 1986 | Harrow | 2 | 1 | Slight |
| Fri 22 Aug 1986 | Harrow | 2 | 1 | Slight |
| Sat 23 Aug 1986 | Harrow | 2 | 1 | Slight |
| Mon 8 Sep 1986 | Harrow | 2 | 1 | Serious |
| Mon 8 Sep 1986 | Harrow | 2 | 1 | Slight |
| Tue 23 Sep 1986 | Harrow | 1 | 1 | Slight |
| Sat 27 Sep 1986 | Harrow | 1 | 1 | Slight |
| Wed 1 Oct 1986 | Harrow | 1 | 1 | Slight |
| Fri 3 Oct 1986 | Harrow | 1 | 1 | Serious |
| Wed 15 Oct 1986 | Harrow | 2 | 1 | Slight |
| Fri 17 Oct 1986 | Harrow | 1 | 1 | Slight |
| Sat 18 Oct 1986 | Harrow | 2 | 1 | Slight |
| Tue 21 Oct 1986 | Harrow | 1 | 1 | Slight |
| Sat 25 Oct 1986 | Harrow | 1 | 1 | Slight |
| Mon 27 Oct 1986 | Harrow | 2 | 1 | Slight |
| Tue 28 Oct 1986 | Harrow | 2 | 1 | Slight |
| Thu 30 Oct 1986 | Brent | 2 | 1 | Slight |
| Sat 1 Nov 1986 | Harrow | 2 | 1 | Slight |
| Fri 7 Nov 1986 | Harrow | 1 | 1 | Slight |
| Sun 9 Nov 1986 | Harrow | 1 | 1 | Slight |
| Tue 11 Nov 1986 | Harrow | 2 | 1 | Slight |
| Wed 12 Nov 1986 | Harrow | 2 | 1 | Slight |
| Wed 12 Nov 1986 | Harrow | 1 | 1 | Slight |
| Fri 14 Nov 1986 | Harrow | 3 | 1 | Slight |
| Sat 15 Nov 1986 | Harrow | 2 | 1 | Slight |
| Tue 18 Nov 1986 | Harrow | 2 | 1 | Slight |
| Thu 20 Nov 1986 | Harrow | 1 | 1 | Slight |
| Fri 28 Nov 1986 | Harrow | 1 | 1 | Slight |
| Wed 3 Dec 1986 | Harrow | 2 | 1 | Slight |
| Mon 8 Dec 1986 | Harrow | 1 | 1 | Slight |
| Fri 12 Dec 1986 | Harrow | 2 | 1 | Serious |
| Fri 19 Dec 1986 | Harrow | 2 | 1 | Slight |
| Sat 20 Dec 1986 | Harrow | 1 | 1 | Slight |
| Tue 23 Dec 1986 | Harrow | 2 | 1 | Slight |
| Wed 24 Dec 1986 | Harrow | 1 | 1 | Slight |
| Sat 27 Dec 1986 | Harrow | 1 | 1 | Slight |
| Sun 28 Dec 1986 | Harrow | 2 | 2 | Slight |
| Mon 29 Dec 1986 | Harrow | 1 | 1 | Slight |
| Mon 29 Dec 1986 | Harrow | 1 | 1 | Slight |