Causing death by dangerous driving is an indictable offence under Section 1 of the Road Traffic Act 1988, committed when a person kills another by driving a mechanically propelled vehicle dangerously on a road or other public place.1Legislation.gov.uk. Road Traffic Act 1988 – Section 1 For offences committed on or after 28 June 2022, the maximum sentence is life imprisonment. Every case is tried in the Crown Court before a jury, and every conviction brings a minimum five-year driving ban followed by a compulsory extended driving test before a licence can be regained.
What the Prosecution Has to Prove
Three elements must be established beyond reasonable doubt: that the defendant was driving, that the driving was dangerous within the meaning of the Act, and that the driving caused the death. The vehicle can be anything mechanically propelled, so cars, motorcycles, lorries, and electric vehicles all fall within the offence. Each of the three elements has its own legal test, and each is a separate route for the defence to challenge.
When Driving Counts as Dangerous
Section 2A of the Road Traffic Act 1988 sets a two-part objective test. Driving is dangerous when the standard falls far below what would be expected of a competent and careful driver, and when it would be obvious to such a driver that driving that way would be dangerous.2Legislation.gov.uk. Road Traffic Act 1988 – Section 2A “Dangerous” means a risk of injury to any person or serious damage to property.
Because the test is objective, the defendant’s own view of the risk is irrelevant. Courts look at the whole picture: speed, road and weather conditions, traffic, visibility, and the driver’s behaviour in the moments before the collision. Overtaking on a blind bend, racing, running red lights at busy junctions, and driving at speed while using a mobile phone are the sorts of behaviour that have met the threshold.
The state of the vehicle itself can be enough. If it would be obvious to a competent driver that driving the vehicle in its current condition was dangerous, the test is satisfied even where the manner of driving looked ordinary. Bald tyres or failed brakes can ground a conviction, and the court will consider anything attached to, carried on, or carried in the vehicle when assessing its state.2Legislation.gov.uk. Road Traffic Act 1988 – Section 2A
Dangerous Driving Versus Careless Driving
Section 2B creates a separate offence of causing death by careless driving, which requires only that the driving fell below the standard of a competent and careful driver.3The Crown Prosecution Service. Road Traffic – Fatal Offences and Bad Driving The dangerous driving offence requires the standard to fall far below that benchmark. The word “far” is the dividing line, and it shifts the maximum sentence from five years’ custody for careless driving causing death to life imprisonment for dangerous driving causing death.
A momentary lapse of concentration that ends in a fatal collision tends to be charged as careless driving; sustained aggressive driving or deliberate risk-taking tends toward the dangerous driving charge. Where a jury is not satisfied the driving reached the “far below” threshold, it can return an alternative verdict on the lesser offence.
Proving the Death Was Caused by the Driving
The driving does not have to be the sole or main cause of death. It has to be a more than minimal cause.4LexisNexis. Death by Dangerous Driving Other contributing factors do not break the chain of causation as long as the driving played a real part.
Courts distinguish between driving that causes the death and driving that merely creates the occasion for it. In R v Skelton, the Court of Appeal confirmed that the dangerous driving does not need to be happening at the moment of impact; it is enough that it played a part in producing the fatal outcome. A driver who overtakes dangerously and forces an oncoming vehicle to swerve into a fatal crash seconds later can be convicted even though the defendant’s own vehicle never made contact.
The practical question juries ask is whether the person would have died had the defendant not driven dangerously. Only a genuinely unforeseeable intervening event, wholly unconnected to the original driving, will break the chain, and the bar is high.
Sentence: Up to Life Imprisonment
Section 86 of the Police, Crime, Sentencing and Courts Act 2022 raised the maximum from 14 years’ custody to life imprisonment for offences committed on or after 28 June 2022.5Legislation.gov.uk. Police, Crime, Sentencing and Courts Act 2022 – Section 86 Offences committed before that date remain subject to the 14-year maximum.
The Sentencing Council’s guideline places each case into one of three culpability categories based on how far the driving fell below the expected standard:6Sentencing Council. Causing Death by Dangerous Driving
- Culpability A (most serious): starting point of 12 years’ custody, range 8 to 18 years.
- Culpability B (intermediate): starting point of 6 years’ custody, range 4 to 9 years.
- Culpability C (lower end): starting point of 3 years’ custody, range 2 to 5 years.
The judge moves up or down from the starting point according to aggravating and mitigating factors. Previous convictions and offending on bail are statutory aggravators. Others include a vulnerable victim (pedestrians, cyclists, horse riders, motorcyclists), additional serious injuries to others, failing to stop or obstructing help, passengers in the offender’s vehicle including children, commercial driving, knowingly driving an unsafe vehicle, and falsely blaming others.
Mitigation can include a clean driving record, genuine remorse, efforts to help at the scene, significant contribution to the collision by the victim or a third party, the offender’s age (particularly 18 to 25), caring responsibilities, mental health conditions, and a genuine emergency behind the driving, though the last of these rarely produces a large reduction where the driving was truly dangerous.
Driving Ban and Extended Retest
Every conviction triggers a compulsory disqualification of at least five years under Section 34(4ZA) of the Road Traffic Offenders Act 1988.7Legislation.gov.uk. Road Traffic Offenders Act 1988 – Disqualification Longer bans are common in high-culpability cases. The court must also order that the offender pass an extended driving test before being allowed to hold a licence again.4LexisNexis. Death by Dangerous Driving The extended test is longer and more demanding than the standard practical test, and passing it is the only route back onto the road once the ban ends.
Defences
There is no standalone statutory defence, but each of the three elements can be challenged. Causation is often the strongest line: showing that something other than the driving caused the death, or that the driving’s contribution was truly minimal, defeats the charge. An example is a sudden medical episode that would have killed the victim regardless of the collision.
The defence can also challenge whether the driving crossed from careless into dangerous. If the jury accepts the driving fell below the competent standard but not far below it, a verdict on the lesser Section 2B offence is available.
Automatism, meaning a complete and involuntary loss of control, can be run but rarely succeeds. A first-ever seizure might qualify. Falling asleep at the wheel generally does not, because drowsiness is treated as something a competent driver would notice and respond to before losing consciousness. Mechanical failure can also be raised, but only where the defect was genuinely undetectable; if the driver knew or should have noticed the problem, the vehicle’s condition becomes evidence of dangerous driving under Section 2A rather than a defence to it.
If the Victim Survives With Serious Injury
Where dangerous driving causes serious injury rather than death, the charge is under Section 1A of the Road Traffic Act 1988. “Serious injury” means grievous bodily harm in England and Wales, or severe physical injury in Scotland.8Legislation.gov.uk. Road Traffic Act 1988 – Section 1A The Section 2A definition of dangerous driving and the same causation test apply. Prosecutors sometimes charge this offence first and upgrade to death by dangerous driving if the victim later dies, and both charges can appear together where a single collision produced multiple victims.