Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Tue 7 Jan 1986 | Hillingdon | 2 | 2 | Slight |
| Sun 12 Jan 1986 | Hillingdon | 2 | 2 | Serious |
| Sat 18 Jan 1986 | Hillingdon | 2 | 1 | Slight |
| Sat 18 Jan 1986 | Hillingdon | 2 | 5 | Serious |
| Mon 20 Jan 1986 | Hillingdon | 3 | 2 | Slight |
| Wed 22 Jan 1986 | Hillingdon | 1 | 1 | Slight |
| Sun 26 Jan 1986 | Hillingdon | 2 | 3 | Slight |
| Sun 26 Jan 1986 | Hillingdon | 1 | 1 | Slight |
| Mon 27 Jan 1986 | Hillingdon | 2 | 1 | Slight |
| Sat 8 Feb 1986 | Hillingdon | 2 | 1 | Slight |
| Tue 11 Feb 1986 | Hillingdon | 2 | 1 | Slight |
| Tue 11 Feb 1986 | Hillingdon | 2 | 1 | Slight |
| Tue 11 Feb 1986 | Hillingdon | 2 | 1 | Slight |
| Thu 13 Feb 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 14 Feb 1986 | Hillingdon | 2 | 1 | Serious |
| Mon 24 Feb 1986 | Hillingdon | 2 | 1 | Slight |
| Thu 27 Feb 1986 | Hillingdon | 2 | 2 | Slight |
| Fri 28 Feb 1986 | Hillingdon | 2 | 1 | Slight |
| Mon 3 Mar 1986 | Hillingdon | 1 | 1 | Slight |
| Thu 13 Mar 1986 | Hillingdon | 2 | 2 | Serious |
| Sun 16 Mar 1986 | Hillingdon | 1 | 1 | Slight |
| Sun 16 Mar 1986 | Hillingdon | 1 | 1 | Slight |
| Mon 17 Mar 1986 | Hillingdon | 1 | 1 | Slight |
| Tue 8 Apr 1986 | Hillingdon | 1 | 2 | Slight |
| Sat 12 Apr 1986 | Hillingdon | 1 | 1 | Slight |
| Mon 14 Apr 1986 | Hillingdon | 1 | 1 | Slight |
| Sat 19 Apr 1986 | Hillingdon | 2 | 2 | Slight |
| Mon 21 Apr 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 25 Apr 1986 | Hillingdon | 2 | 2 | Slight |
| Sat 26 Apr 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 2 May 1986 | Hillingdon | 4 | 1 | Slight |
| Tue 6 May 1986 | Hillingdon | 2 | 1 | Slight |
| Thu 8 May 1986 | Hillingdon | 2 | 1 | Slight |
| Mon 12 May 1986 | Hillingdon | 2 | 1 | Slight |
| Mon 12 May 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 16 May 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 16 May 1986 | Hillingdon | 1 | 1 | Slight |
| Fri 16 May 1986 | Hillingdon | 2 | 1 | Serious |
| Sat 17 May 1986 | Hillingdon | 2 | 1 | Slight |
| Sun 18 May 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 23 May 1986 | Hillingdon | 2 | 1 | Slight |
| Sun 1 Jun 1986 | Hillingdon | 2 | 1 | Slight |
| Tue 10 Jun 1986 | Hillingdon | 2 | 2 | Serious |
| Tue 10 Jun 1986 | Hillingdon | 2 | 2 | Serious |
| Thu 12 Jun 1986 | Hillingdon | 2 | 1 | Slight |
| Wed 18 Jun 1986 | Hillingdon | 1 | 1 | Slight |
| Fri 20 Jun 1986 | Hillingdon | 1 | 1 | Slight |
| Thu 3 Jul 1986 | Hillingdon | 2 | 1 | Slight |
| Mon 7 Jul 1986 | Hillingdon | 2 | 1 | Slight |
| Thu 10 Jul 1986 | Hillingdon | 1 | 1 | Slight |
| Wed 16 Jul 1986 | Hillingdon | 1 | 3 | Slight |
| Thu 24 Jul 1986 | Hillingdon | 1 | 1 | Serious |
| Thu 31 Jul 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 1 Aug 1986 | Hillingdon | 2 | 2 | Slight |
| Sat 2 Aug 1986 | Hillingdon | 1 | 1 | Serious |
| Tue 5 Aug 1986 | Hillingdon | 3 | 1 | Slight |
| Wed 6 Aug 1986 | Hillingdon | 3 | 2 | Serious |
| Thu 7 Aug 1986 | Hillingdon | 1 | 1 | Slight |
| Fri 8 Aug 1986 | Hillingdon | 2 | 1 | Slight |
| Sat 9 Aug 1986 | Hillingdon | 2 | 1 | Slight |
| Tue 12 Aug 1986 | Hillingdon | 2 | 2 | Slight |
| Fri 15 Aug 1986 | Hillingdon | 2 | 1 | Serious |
| Fri 15 Aug 1986 | Hillingdon | 2 | 1 | Serious |
| Sat 16 Aug 1986 | Hillingdon | 2 | 1 | Slight |
| Thu 21 Aug 1986 | Hillingdon | 2 | 1 | Slight |
| Wed 27 Aug 1986 | Hillingdon | 2 | 1 | Serious |
| Mon 1 Sep 1986 | Hillingdon | 2 | 1 | Slight |
| Mon 1 Sep 1986 | Hillingdon | 1 | 1 | Serious |
| Tue 9 Sep 1986 | Hillingdon | 2 | 2 | Serious |
| Sun 14 Sep 1986 | Hillingdon | 2 | 3 | Serious |
| Mon 22 Sep 1986 | Hillingdon | 1 | 1 | Slight |
| Fri 26 Sep 1986 | Hillingdon | 2 | 1 | Slight |
| Sun 28 Sep 1986 | Hillingdon | 2 | 1 | Slight |
| Sat 4 Oct 1986 | Hillingdon | 1 | 1 | Slight |
| Sat 4 Oct 1986 | Hillingdon | 3 | 1 | Slight |
| Wed 8 Oct 1986 | Hillingdon | 1 | 1 | Slight |
| Sat 18 Oct 1986 | Hillingdon | 2 | 2 | Slight |
| Tue 21 Oct 1986 | Hillingdon | 2 | 2 | Slight |
| Thu 23 Oct 1986 | Harrow | 4 | 2 | Serious |
| Thu 23 Oct 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 31 Oct 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 31 Oct 1986 | Hillingdon | 2 | 1 | Slight |
| Tue 4 Nov 1986 | Hillingdon | 2 | 1 | Slight |
| Sat 8 Nov 1986 | Hillingdon | 1 | 1 | Slight |
| Sat 8 Nov 1986 | Hillingdon | 2 | 2 | Slight |
| Mon 10 Nov 1986 | Hillingdon | 2 | 1 | Slight |
| Mon 10 Nov 1986 | Hillingdon | 2 | 1 | Slight |
| Thu 13 Nov 1986 | Hillingdon | 2 | 1 | Slight |
| Thu 13 Nov 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 14 Nov 1986 | Hillingdon | 2 | 1 | Slight |
| Tue 18 Nov 1986 | Hillingdon | 2 | 1 | Slight |
| Thu 20 Nov 1986 | Hillingdon | 2 | 1 | Slight |
| Fri 28 Nov 1986 | Hillingdon | 2 | 2 | Slight |
| Sat 6 Dec 1986 | Hillingdon | 2 | 1 | Slight |
| Wed 10 Dec 1986 | Hillingdon | 2 | 1 | Serious |
| Wed 10 Dec 1986 | Hillingdon | 2 | 1 | Serious |
| Sun 14 Dec 1986 | Hillingdon | 1 | 1 | Slight |
| Sun 21 Dec 1986 | Hillingdon | 2 | 2 | Serious |
| Sat 27 Dec 1986 | Hillingdon | 2 | 1 | Serious |