The M25: where people are seriously hurt
Over 2021–2025, 439 people were killed or seriously injured in 369 collisions on the M25, making it the 15th worst numbered road in Britain by that measure.
369
serious or fatal collisions
439
people killed or seriously injured
25
collisions that took a life
#15
of 150 numbered roads
What the record shows
The M25 carries 2,302 recorded injury collisions over the period, 369 of them serious or fatal. Serious injury concentrates in Epping Forest, Sevenoaks, Runnymede, with 3 further areas also recording collisions. Its fatal share, 7%, sits close to the 7% average for the numbered network. Most collisions were recorded on 70 mph sections. The worst year of the period was 2025 with 87 serious collisions, and the count is up 50% between 2021 and 2025.
Every serious and fatal collision on the M25
Blue markers are serious collisions, red crosses fatal. Click any marker for the year. Zoom in to see the specific junctions and stretches where they cluster.
Where along the route
- Epping Forest37 KSI
- Sevenoaks34 KSI
- Runnymede33 KSI
- Tandridge31 KSI
- Three Rivers24 KSI
- Havering22 KSI
Local authority areas with the most serious collisions on this road.
The trend
Serious and fatal collisions on the M25
2025: 87 (up 17.6% on the year before) · peak 87 in 2025 · +50% across the period
Axis clipped to the data range to show year-on-year movement.
About the M25
How many accidents happen on the M25?
Police recorded 2,302 injury collisions on the M25 over 2021–2025, of which 369 were fatal or serious. Those serious collisions left 439 people killed or seriously injured, including 25 fatal collisions.
Is the M25 a dangerous road?
By volume of serious injury it ranks 15 of the 150 numbered roads we analyse, and 2 among motorways. That is a count rather than a rate: longer and busier roads accumulate more collisions, so a high ranking reflects exposure as well as risk.
Where on the M25 do collisions happen?
They concentrate in Epping Forest, Sevenoaks, Runnymede. The map on this page plots every serious and fatal collision recorded on the route, so you can see the specific stretches rather than the total.
Counts include every collision the police recorded on this road number across all authority areas. They are not adjusted for traffic volume or road length, so treat them as a measure of where injury concentrates rather than a per-mile risk rating. Method. Free to reuse with attribution to this page.
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