Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Wed 1 Jan 1986 | Harrow | 2 | 1 | Slight |
| Wed 8 Jan 1986 | Harrow | 2 | 1 | Serious |
| Wed 8 Jan 1986 | Harrow | 2 | 1 | Slight |
| Thu 9 Jan 1986 | Harrow | 2 | 1 | Slight |
| Sat 11 Jan 1986 | Brent | 2 | 1 | Fatal |
| Tue 14 Jan 1986 | Harrow | 1 | 1 | Slight |
| Sat 18 Jan 1986 | Harrow | 2 | 2 | Slight |
| Tue 28 Jan 1986 | Hertsmere | 2 | 1 | Slight |
| Wed 29 Jan 1986 | Harrow | 2 | 1 | Slight |
| Mon 3 Feb 1986 | Harrow | 3 | 1 | Slight |
| Mon 10 Feb 1986 | Brent | 3 | 2 | Serious |
| Thu 13 Feb 1986 | Harrow | 2 | 1 | Slight |
| Fri 14 Feb 1986 | Brent | 2 | 1 | Slight |
| Fri 14 Feb 1986 | Hertsmere | 2 | 1 | Slight |
| Mon 17 Feb 1986 | Brent | 1 | 1 | Slight |
| Wed 19 Feb 1986 | Brent | 2 | 1 | Slight |
| Mon 3 Mar 1986 | Harrow | 2 | 1 | Slight |
| Tue 4 Mar 1986 | Brent | 2 | 1 | Slight |
| Wed 5 Mar 1986 | Harrow | 1 | 1 | Slight |
| Thu 6 Mar 1986 | Harrow | 3 | 1 | Slight |
| Tue 11 Mar 1986 | Hertsmere | 1 | 1 | Slight |
| Thu 20 Mar 1986 | Harrow | 1 | 1 | Slight |
| Fri 21 Mar 1986 | Harrow | 1 | 1 | Slight |
| Mon 24 Mar 1986 | Harrow | 2 | 1 | Slight |
| Mon 31 Mar 1986 | Harrow | 1 | 1 | Serious |
| Mon 31 Mar 1986 | Harrow | 1 | 1 | Serious |
| Tue 1 Apr 1986 | Harrow | 2 | 1 | Slight |
| Wed 2 Apr 1986 | Harrow | 2 | 1 | Slight |
| Thu 3 Apr 1986 | Harrow | 1 | 1 | Slight |
| Wed 9 Apr 1986 | Hertsmere | 2 | 1 | Serious |
| Thu 10 Apr 1986 | Harrow | 1 | 1 | Slight |
| Fri 11 Apr 1986 | Harrow | 2 | 1 | Slight |
| Mon 21 Apr 1986 | Brent | 1 | 1 | Slight |
| Tue 22 Apr 1986 | Harrow | 1 | 1 | Slight |
| Wed 23 Apr 1986 | Hertsmere | 2 | 1 | Slight |
| Wed 30 Apr 1986 | Harrow | 2 | 1 | Slight |
| Thu 8 May 1986 | Brent | 1 | 1 | Slight |
| Thu 8 May 1986 | Harrow | 1 | 1 | Serious |
| Thu 8 May 1986 | Hertsmere | 2 | 1 | Serious |
| Mon 12 May 1986 | Hertsmere | 2 | 1 | Serious |
| Thu 15 May 1986 | Harrow | 2 | 1 | Serious |
| Thu 15 May 1986 | Harrow | 2 | 1 | Serious |
| Fri 16 May 1986 | Harrow | 2 | 1 | Slight |
| Wed 21 May 1986 | Harrow | 2 | 1 | Serious |
| Wed 28 May 1986 | Brent | 3 | 2 | Slight |
| Wed 28 May 1986 | Brent | 3 | 2 | Slight |
| Fri 30 May 1986 | Hertsmere | 1 | 1 | Slight |
| Tue 3 Jun 1986 | Hertsmere | 2 | 1 | Slight |
| Thu 5 Jun 1986 | Hertsmere | 1 | 1 | Slight |
| Tue 10 Jun 1986 | Harrow | 2 | 1 | Slight |
| Fri 13 Jun 1986 | Harrow | 2 | 1 | Slight |
| Wed 18 Jun 1986 | Harrow | 1 | 1 | Slight |
| Mon 23 Jun 1986 | Harrow | 2 | 2 | Slight |
| Tue 24 Jun 1986 | Harrow | 2 | 1 | Serious |
| Fri 25 Jul 1986 | Harrow | 2 | 1 | Slight |
| Sat 26 Jul 1986 | Brent | 2 | 1 | Slight |
| Sun 27 Jul 1986 | Harrow | 2 | 1 | Slight |
| Sun 27 Jul 1986 | Harrow | 2 | 1 | Slight |
| Thu 31 Jul 1986 | Harrow | 1 | 1 | Slight |
| Fri 1 Aug 1986 | Brent | 2 | 2 | Slight |
| Sat 2 Aug 1986 | Harrow | 2 | 1 | Slight |
| Mon 4 Aug 1986 | Harrow | 2 | 1 | Slight |
| Sat 9 Aug 1986 | Harrow | 2 | 1 | Slight |
| Sun 10 Aug 1986 | Harrow | 2 | 1 | Slight |
| Sun 10 Aug 1986 | Harrow | 2 | 1 | Slight |
| Wed 13 Aug 1986 | Harrow | 1 | 1 | Slight |
| Tue 26 Aug 1986 | Hertsmere | 1 | 1 | Serious |
| Fri 29 Aug 1986 | Harrow | 2 | 1 | Slight |
| Sun 31 Aug 1986 | Harrow | 2 | 3 | Serious |
| Mon 8 Sep 1986 | Brent | 1 | 1 | Slight |
| Tue 9 Sep 1986 | Harrow | 1 | 1 | Slight |
| Tue 9 Sep 1986 | Harrow | 1 | 1 | Slight |
| Mon 15 Sep 1986 | Brent | 2 | 1 | Serious |
| Mon 29 Sep 1986 | Hertsmere | 1 | 1 | Slight |
| Mon 29 Sep 1986 | Harrow | 2 | 1 | Slight |
| Sat 18 Oct 1986 | Harrow | 2 | 2 | Slight |
| Sat 18 Oct 1986 | Brent | 1 | 2 | Serious |
| Sun 19 Oct 1986 | Brent | 2 | 1 | Slight |
| Tue 21 Oct 1986 | Brent | 2 | 1 | Slight |
| Thu 23 Oct 1986 | Harrow | 2 | 1 | Slight |
| Thu 23 Oct 1986 | Harrow | 2 | 1 | Slight |
| Wed 29 Oct 1986 | Harrow | 2 | 1 | Slight |
| Tue 4 Nov 1986 | Harrow | 1 | 1 | Slight |
| Sat 8 Nov 1986 | Harrow | 2 | 1 | Serious |
| Tue 11 Nov 1986 | Harrow | 2 | 1 | Slight |
| Tue 11 Nov 1986 | Harrow | 2 | 1 | Fatal |
| Thu 13 Nov 1986 | Harrow | 2 | 1 | Slight |
| Fri 14 Nov 1986 | Harrow | 2 | 1 | Slight |
| Sat 15 Nov 1986 | Harrow | 2 | 1 | Slight |
| Sun 23 Nov 1986 | Harrow | 2 | 2 | Slight |
| Sun 23 Nov 1986 | Harrow | 2 | 1 | Slight |
| Fri 28 Nov 1986 | Brent | 3 | 2 | Slight |
| Sat 29 Nov 1986 | Harrow | 2 | 2 | Slight |
| Tue 9 Dec 1986 | Harrow | 2 | 1 | Slight |
| Mon 15 Dec 1986 | Brent | 2 | 1 | Slight |
| Thu 18 Dec 1986 | Harrow | 1 | 1 | Slight |
| Sun 21 Dec 1986 | Harrow | 2 | 1 | Slight |