Fatal
Serious
Slight
Uncategorised
| Date | Local Authority | Vehicles | Casualties | Severity |
|---|---|---|---|---|
| Mon 18 Jan 1999 | Harrow | 2 | 1 | Slight |
| Fri 22 Jan 1999 | Harrow | 3 | 1 | Slight |
| Wed 3 Feb 1999 | Harrow | 2 | 1 | Slight |
| Sun 7 Feb 1999 | Harrow | 2 | 2 | Slight |
| Mon 8 Feb 1999 | Harrow | 2 | 1 | Slight |
| Mon 8 Feb 1999 | Harrow | 2 | 1 | Slight |
| Mon 8 Feb 1999 | Harrow | 2 | 1 | Slight |
| Tue 9 Feb 1999 | Harrow | 1 | 1 | Slight |
| Sun 14 Feb 1999 | Harrow | 3 | 2 | Serious |
| Wed 17 Feb 1999 | Harrow | 1 | 1 | Slight |
| Sat 20 Feb 1999 | Harrow | 3 | 2 | Slight |
| Wed 24 Feb 1999 | Harrow | 2 | 1 | Slight |
| Mon 1 Mar 1999 | Harrow | 1 | 1 | Serious |
| Mon 8 Mar 1999 | Harrow | 2 | 1 | Slight |
| Mon 8 Mar 1999 | Harrow | 2 | 1 | Slight |
| Fri 12 Mar 1999 | Harrow | 2 | 1 | Slight |
| Sat 13 Mar 1999 | Harrow | 2 | 3 | Serious |
| Mon 15 Mar 1999 | Harrow | 3 | 1 | Serious |
| Fri 19 Mar 1999 | Harrow | 3 | 1 | Slight |
| Sun 28 Mar 1999 | Harrow | 2 | 2 | Slight |
| Wed 7 Apr 1999 | Harrow | 2 | 1 | Serious |
| Tue 13 Apr 1999 | Harrow | 1 | 1 | Fatal |
| Thu 15 Apr 1999 | Harrow | 1 | 1 | Slight |
| Mon 26 Apr 1999 | Harrow | 2 | 1 | Slight |
| Fri 30 Apr 1999 | Harrow | 1 | 2 | Fatal |
| Thu 6 May 1999 | Harrow | 2 | 1 | Slight |
| Fri 14 May 1999 | Harrow | 2 | 1 | Slight |
| Sat 15 May 1999 | Harrow | 2 | 2 | Slight |
| Sun 23 May 1999 | Harrow | 2 | 1 | Slight |
| Sat 29 May 1999 | Harrow | 1 | 1 | Slight |
| Mon 14 Jun 1999 | Harrow | 2 | 1 | Slight |
| Thu 24 Jun 1999 | Harrow | 2 | 1 | Slight |
| Sat 26 Jun 1999 | Harrow | 2 | 1 | Slight |
| Sat 3 Jul 1999 | Harrow | 2 | 1 | Slight |
| Sat 3 Jul 1999 | Harrow | 1 | 1 | Slight |
| Wed 7 Jul 1999 | Harrow | 2 | 1 | Slight |
| Sun 11 Jul 1999 | Harrow | 1 | 1 | Slight |
| Wed 14 Jul 1999 | Harrow | 2 | 2 | Slight |
| Sun 18 Jul 1999 | Harrow | 2 | 3 | Slight |
| Sun 18 Jul 1999 | Harrow | 2 | 3 | Slight |
| Thu 22 Jul 1999 | Harrow | 2 | 2 | Slight |
| Fri 23 Jul 1999 | Harrow | 1 | 1 | Serious |
| Mon 26 Jul 1999 | Harrow | 2 | 1 | Slight |
| Thu 5 Aug 1999 | Harrow | 2 | 1 | Slight |
| Thu 5 Aug 1999 | Harrow | 2 | 1 | Slight |
| Sat 14 Aug 1999 | Harrow | 2 | 1 | Slight |
| Mon 23 Aug 1999 | Harrow | 2 | 2 | Serious |
| Thu 26 Aug 1999 | Harrow | 2 | 1 | Slight |
| Fri 27 Aug 1999 | Harrow | 2 | 1 | Slight |
| Fri 27 Aug 1999 | Harrow | 2 | 2 | Slight |
| Wed 8 Sep 1999 | Harrow | 2 | 1 | Slight |
| Tue 14 Sep 1999 | Harrow | 1 | 1 | Slight |
| Tue 14 Sep 1999 | Harrow | 1 | 1 | Slight |
| Fri 24 Sep 1999 | Harrow | 2 | 1 | Slight |
| Fri 1 Oct 1999 | Harrow | 1 | 1 | Slight |
| Mon 4 Oct 1999 | Harrow | 1 | 1 | Slight |
| Tue 5 Oct 1999 | Harrow | 4 | 1 | Slight |
| Fri 22 Oct 1999 | Harrow | 1 | 1 | Serious |
| Fri 22 Oct 1999 | Harrow | 2 | 1 | Slight |
| Sat 30 Oct 1999 | Harrow | 2 | 1 | Slight |
| Sat 30 Oct 1999 | Harrow | 2 | 1 | Slight |
| Sat 30 Oct 1999 | Harrow | 2 | 1 | Serious |
| Sun 31 Oct 1999 | Harrow | 2 | 1 | Slight |
| Mon 1 Nov 1999 | Harrow | 1 | 1 | Slight |
| Mon 1 Nov 1999 | Harrow | 2 | 2 | Slight |
| Mon 1 Nov 1999 | Harrow | 2 | 2 | Slight |
| Tue 2 Nov 1999 | Harrow | 1 | 1 | Slight |
| Fri 5 Nov 1999 | Harrow | 1 | 1 | Slight |
| Sun 14 Nov 1999 | Harrow | 2 | 1 | Slight |
| Fri 19 Nov 1999 | Harrow | 2 | 1 | Slight |
| Fri 19 Nov 1999 | Barnet | 2 | 1 | Slight |
| Wed 24 Nov 1999 | Barnet | 2 | 2 | Slight |
| Wed 24 Nov 1999 | Harrow | 2 | 3 | Slight |
| Sat 27 Nov 1999 | Harrow | 1 | 1 | Serious |
| Sat 4 Dec 1999 | Harrow | 3 | 1 | Slight |
| Thu 9 Dec 1999 | Harrow | 1 | 1 | Serious |
| Sat 11 Dec 1999 | Harrow | 2 | 1 | Serious |
| Sun 12 Dec 1999 | Harrow | 2 | 1 | Slight |
| Sun 12 Dec 1999 | Harrow | 2 | 1 | Slight |
| Tue 28 Dec 1999 | Barnet | 2 | 1 | Slight |