Road risk in Isle of Anglesey
The official road casualty record for Isle of Anglesey, from DfT STATS19.
Police recorded 33 injury collisions in Isle of Anglesey in 2025, hurting 41 people, of whom 17 were killed or seriously injured.
Not ranked. Isle of Anglesey is held out of our national tablebecause it recorded 17 killed or seriously injured, below the 20 needed for the derived percentages to mean anything. Every figure here is the real recorded number. At this size the derived percentages describe chance more than they describe the place, so there is no rank attached to them. How the floors work.
- Collisions
- 33 in 2025
- People hurt
- 41 casualties
- Killed or seriously injured
- 17
- Killed
- 3
- KSI per billion vehicle miles
- 59.5 (median 80.5)
- KSI, three-year average
- 19 a year
- Severity-adjusted KSI, 2025
- 22 (recorded: 17)
- Severity-adjusted KSI, three-year average
- 25.4 a year (recorded: 19)
- KSI per 100,000 residents
- 24.8
- Population
- 68,607
Compiled by Stephen Hall, Data lead, Swift Assist. Source: DfT STATS19 and DfT road traffic estimates (2025), OGL v3. Updated 2026-10-08.
Five years of collisions in Isle of Anglesey
Across 2021–2025, recorded collisions were down 45.9%, with 2021 the worst year of the period at 61 collisions.
Collisions per year in Isle of Anglesey
2025: 33 (down 31.2% on the year before) · peak 61 in 2021 · -45.9% across the period
Axis clipped to the data range to show year-on-year movement.
Vehicle crime · year ending June 2026
Vehicle crime in Isle of Anglesey
1.13
offences per 1,000 residents
78
offences recorded, 12 months
279
of 287 areas, worst first
Isle of Anglesey recorded 1.13 vehicle offences per 1,000 residents, below the England and Wales rate of 5.04.
Rate calculated from 78 offences and a population of 69,100 (ONS mid-2024), both taken from the same ONS release. Contains public sector information licensed under the Open Government Licence v3.0. Source: Office for National Statistics, Crime in England and Wales: Police Force Area data tables, year ending June 2026; police recorded crime collected by the Home Office.
Pedestrians, cyclists and riders in Isle of Anglesey
These are the road users with the least protection when something goes wrong, and they carry a disproportionate share of the serious injuries. Across 33 collisions in Isle of Anglesey, the three groups appear 16 times between them — an involvement rate of 48.5%.
| Road user | Collisions | Share of all collisions |
|---|---|---|
| Pedestrians | 5 | 15.2% |
| Cyclists | 7 | 21.2% |
| Motorcyclists | 4 | 12.1% |
A single collision can involve more than one of these groups and is then counted in each row, so the rows do not add up to a share of the total.
When collisions happen in Isle of Anglesey
DfT records the light level and road surface at every collision, but publishes neither below national level. These are Isle of Anglesey’s own shares over 134 collisions, with the national figure beside each one for comparison.
| Share of collisions | Isle of Anglesey | National | How it reads |
|---|---|---|---|
| In darknessAny collision where the officer recorded darkness, lit or unlit. | 21.6% | 28.7% | below the national figure |
| In darkness, no street lightingThe rural lighting picture rather than the urban speeding one. | 14.2% | 6.3% | more than double the national figure |
| On a wet road surfaceWet, damp or standing water at the scene. | 25.6% | 24.5% | close to the national figure |
| On snow or iceRare everywhere, and concentrated in a handful of authorities. | 2.3% | 1.4% | well above the national figure |
The winter effect. Collisions in Isle of Anglesey run 50% lower from November to January than from May to July — against 4.5% lower nationally. That is 23 collisions against 46.
What this does not tell you
- A share is not a rate. A high darkness share means darkness accounts for more of Isle of Anglesey’s collisions — not that its roads are more dangerous overall. Read it alongside the casualties-per-mile-driven figure above.
- Condition is recorded, not tested. The officer records the surface and light level at the scene. It is an observation, not a measurement, and it is not a finding that the condition caused the collision.
- Exposure is not controlled for. Fewer people travel at 3am than at 3pm, so a collision in darkness is drawn from a smaller pool of journeys. Without hourly traffic counts, these shares describe when collisions happen rather than how risky an hour is.
Every authority compared on the same measures: winter road risk across Britain.
Road risk in Isle of Anglesey, answered
How dangerous are the roads in Isle of Anglesey?
In the latest official DfT figures, 33 road collisions in Isle of Anglesey injured or killed 41 people, 17 of them killed or seriously injured. Isle of Anglesey is not ranked in our national table because it recorded 17 killed or seriously injured, below the 20 needed for the derived percentages to mean anything.
Are road casualties in Isle of Anglesey rising or falling?
Across 2021–2025, recorded collisions in Isle of Anglesey were down 45.9%, with 2021 the worst year of the period at 61 collisions. Year-to-year movement in a single authority is noisy, so the five-year direction carries more than any single year's change.
Who is being hurt on Isle of Anglesey's roads?
In Isle of Anglesey there were 5 collisions involving pedestrians, 7 involving cyclists and 4 involving motorcyclists, out of 33 in total. Added together that is an involvement rate of 48.5%, though a collision involving two of those groups is counted in both figures, so it is a comparable index rather than a clean share.
Who is responsible for road safety in Isle of Anglesey?
Isle of Anglesey is a welsh principal area, and is the highway authority for its own roads. That means it sets local speed limits, designs junctions and crossings, and decides safety scheme spending. Motorways and most trunk roads are managed separately by National Highways in England, Transport Scotland, or the Welsh Government, so the worst road in an area is often not the council's to change. Enforcement sits with the local police force.
Where does this data come from?
DfT STATS19, the record police complete at the scene of every injury collision, published annually under the Open Government Licence, combined with DfT's own road traffic estimates for the mileage denominator. Collision, casualty and KSI counts on this page are for 2025; only the trend compares 2021–2025. STATS19 counts collisions police attended and recorded, so collisions never reported do not appear, and under-reporting is known to be worst for cyclists and for slight injuries.
What actually changes the odds in Isle of Anglesey
Data is only useful if it changes what you do. These three are picked from Isle of Anglesey’s own figures above, each with the number that prompted it. Every guide explains how the thing works before it suggests buying anything, and most cost less than a third of a typical insurance excess.
Helmet camera
£50–£200
21% of collisions in Isle of Anglesey involve someone on a bike. In a disputed pull-out, footage from the rider's viewpoint is what settles liability.
How it works →
Alarmed disc lock
£20–£50
Motorcyclists are in 12% of Isle of Anglesey's collisions, and bikes are also lifted rather than ridden away. An alarmed disc lock covers the theft half for about £30.
How it works →
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