Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Fri 11 Jan 1985 | Hertsmere | 2 | 1 | Serious |
| Sat 12 Jan 1985 | Hertsmere | 2 | 1 | Slight |
| Thu 17 Jan 1985 | Hertsmere | 2 | 1 | Slight |
| Wed 23 Jan 1985 | Hertsmere | 2 | 3 | Slight |
| Sun 3 Mar 1985 | Watford | 2 | 1 | Slight |
| Fri 15 Mar 1985 | Harrow | 2 | 1 | Slight |
| Tue 26 Mar 1985 | Three Rivers | 2 | 1 | Slight |
| Sat 30 Mar 1985 | Harrow | 2 | 1 | Slight |
| Sat 30 Mar 1985 | Harrow | 2 | 1 | Slight |
| Thu 11 Apr 1985 | Watford | 1 | 1 | Slight |
| Fri 26 Apr 1985 | Three Rivers | 2 | 2 | Slight |
| Sat 4 May 1985 | Harrow | 2 | 1 | Slight |
| Wed 8 May 1985 | Harrow | 1 | 1 | Slight |
| Sat 11 May 1985 | Hertsmere | 2 | 1 | Slight |
| Sun 12 May 1985 | Watford | 2 | 1 | Slight |
| Sun 12 May 1985 | Watford | 2 | 1 | Slight |
| Fri 24 May 1985 | Three Rivers | 3 | 2 | Serious |
| Tue 4 Jun 1985 | Three Rivers | 2 | 1 | Slight |
| Thu 6 Jun 1985 | Hertsmere | 1 | 1 | Slight |
| Fri 7 Jun 1985 | Hertsmere | 2 | 2 | Slight |
| Thu 27 Jun 1985 | Hertsmere | 2 | 2 | Slight |
| Tue 2 Jul 1985 | Harrow | 2 | 1 | Slight |
| Tue 16 Jul 1985 | Hertsmere | 2 | 2 | Slight |
| Wed 17 Jul 1985 | Watford | 2 | 1 | Slight |
| Wed 24 Jul 1985 | Watford | 2 | 1 | Slight |
| Fri 26 Jul 1985 | Hertsmere | 2 | 1 | Serious |
| Sun 28 Jul 1985 | Watford | 2 | 1 | Serious |
| Sun 4 Aug 1985 | Watford | 2 | 1 | Slight |
| Mon 5 Aug 1985 | Hertsmere | 1 | 1 | Serious |
| Tue 6 Aug 1985 | Three Rivers | 2 | 1 | Slight |
| Thu 8 Aug 1985 | Harrow | 2 | 1 | Slight |
| Fri 9 Aug 1985 | Hertsmere | 3 | 1 | Slight |
| Sun 18 Aug 1985 | Hertsmere | 1 | 1 | Slight |
| Fri 6 Sep 1985 | Three Rivers | 2 | 1 | Slight |
| Wed 11 Sep 1985 | Hertsmere | 2 | 3 | Fatal |
| Sun 15 Sep 1985 | Watford | 2 | 1 | Slight |
| Sun 15 Sep 1985 | Watford | 2 | 1 | Slight |
| Sun 15 Sep 1985 | Watford | 2 | 1 | Slight |
| Sun 15 Sep 1985 | Watford | 2 | 1 | Slight |
| Thu 19 Sep 1985 | Watford | 1 | 1 | Slight |
| Fri 4 Oct 1985 | Hertsmere | 2 | 1 | Serious |
| Tue 22 Oct 1985 | Watford | 2 | 1 | Slight |
| Thu 7 Nov 1985 | Three Rivers | 2 | 1 | Serious |
| Fri 8 Nov 1985 | Three Rivers | 3 | 4 | Serious |
| Fri 22 Nov 1985 | Hertsmere | 2 | 1 | Slight |
| Sat 30 Nov 1985 | Three Rivers | 1 | 1 | Slight |
| Sat 30 Nov 1985 | Harrow | 2 | 1 | Fatal |
| Fri 6 Dec 1985 | Hertsmere | 2 | 1 | Slight |
| Wed 18 Dec 1985 | Hertsmere | 2 | 6 | Serious |