N21 postcode district road traffic accidents
The N21 postcode district recorded 998 collisions in the STATS19 data between 1999 and 2025, involving 1,189 casualties. Of these collisions, 9 were fatal and 128 were serious. Recorded collisions in 2025 were up 62% on 2024.
Severity Breakdown
- Fatal
- 9
- Serious
- 128
- Casualties
- 1,189
- Fatal
- 9
- Serious
- 128
- Casualties
- 1,189
Collisions by Year
Areas covering N21
Roads in N21
Planning applications nearby
Data from PlanIndex, an index of UK planning registers.
Data from PlanIndex, an index of UK planning registers.
Accidents in the N21 postcode district
Road collision statistics for the N21 postcode district
Collisions recorded
998
Police-reported road traffic collisions captured in the STATS19 data.
People injured or killed
1,189
Casualties recorded across every collision in this area.
Fatal collisions
9
Collisions in which at least one person died.
Serious collisions
128
13.7% of collisions here ended in a death or serious injury.
Severity of collisions
What the data shows in the N21 postcode district
Collisions in the N21 postcode district are most frequently recorded on a Wednesday (16.3% of the total), with 29.6% happening in darkness rather than daylight. The most common posted speed limit at the scene is 30 mph.
85% of recorded collisions in the N21 postcode district happen on a single carriageway. Around 18.8% were recorded in adverse weather such as rain, snow or fog.
The collisions in the N21 postcode district have produced 1,189 casualties. Pedestrians account for 15.6% of those casualties, a marker of the risk to people on foot here.
Collisions by day of the week
Collisions by day of the week: Sunday 99 collisions, Monday 143 collisions, Tuesday 144 collisions, Wednesday 163 collisions, Thursday 136 collisions, Friday 155 collisions, Saturday 158 collisions.
Light conditions
Light conditions: Daylight 703 collisions, Darkness 295 collisions.
Road type
Road type: Single carriageway 848 collisions, Roundabout 72 collisions, Dual carriageway 30 collisions, Unknown 29 collisions, One way street 12 collisions, Slip road 6 collisions, One way street/Slip road 1 collisions.
Speed limit at the scene
Speed limit at the scene: 20 mph 44 collisions, 30 mph 951 collisions, 40 mph 3 collisions.
Weather at the time
Weather at the time: Fine no high winds 810 collisions, Raining no high winds 120 collisions, Unknown 28 collisions, Other 25 collisions, Fog or mist 6 collisions.
Who was hurt
Who was hurt: Driver or rider 780 casualties, Passenger 223 casualties, Pedestrian 186 casualties.
Move Insights
Thinking of moving to this area?
Check flood risk, planning history, EPC ratings and more with a Move Insights property report.
Recent Accidents
Showing 20 of 998 accidents
Accident 199901YE00520
SlightAccident 199901YE00487
SlightAccident 199901YF00564
SlightAccident 199901YE00477
SeriousAccident 199901YE00439
SeriousAccident 199901YE00399
SlightAccident 199901YE00378
SlightAccident 199901YE00384
SlightAccident 199901YE00355
SeriousAccident 199901YE00342
SlightAccident 199901YF00362
SlightAccident 199901YE00312
SlightAccident 199901YE00330
SlightAccident 199901YE00296
SlightAccident 199901YE00307
SlightAccident 199901YE00288
SlightAccident 199901YE00270
SlightAccident 199901YE00295
SlightAccident 199901YE00275
SlightAccident 199901YE00249
SlightFrequently asked questions about road accidents in the N21 postcode district
How many road accidents have there been in the N21 postcode district?
998 collisions have been recorded in the N21 postcode district in the STATS19 road safety data between 1999 and 2025, involving 1,189 casualties.
How many of the collisions in the N21 postcode district were serious or fatal?
9 were fatal and 128 were serious — 13.7% of all recorded collisions in the N21 postcode district resulted in a death or serious injury.
When do most road accidents happen in the N21 postcode district?
Wednesday is the most common day for collisions in the N21 postcode district, accounting for 16.3% of them, and 29.6% of all collisions here happen in darkness.
What kind of roads do collisions in the N21 postcode district happen on?
85% of collisions in the N21 postcode district are recorded on a single carriageway, most often where the limit is 30 mph.
Are pedestrians often hurt in collisions in the N21 postcode district?
Pedestrians make up 15.6% of the 1,189 casualties recorded in the N21 postcode district.
Is road safety in the N21 postcode district getting better or worse?
Recorded collisions in the N21 postcode district rose 62% in 2025 compared with 2024. Year-on-year figures move with both genuine risk and changes in reporting, so they are best read as a trend rather than a single verdict.
Where does the road accident data for the N21 postcode district come from?
It comes from STATS19, the official record of personal-injury road collisions reported to the police and published by the Department for Transport. The figures for the N21 postcode district cover 1999 to 2025.