Drink driving: limits, evidence, and consequences

The principal drink driving offence is in section 5(1)(a) of the Road Traffic Act 1988. It makes it an offence to drive or attempt to drive a motor vehicle on a road or other public place while the proportion of alcohol in breath, blood or urine exceeds the prescribed limit. The offence is concerned with the alcohol level, rather than whether the driver appeared drunk or drove badly. A person can therefore commit it despite feeling capable of driving and despite no collision having occurred.

The prescribed limits in England and Wales are 35 micrograms of alcohol per 100 millilitres of breath, 80 milligrams per 100 millilitres of blood, and 107 milligrams per 100 millilitres of urine. These are statutory thresholds. There is no separate legal limit for new drivers, professional drivers or people driving a company vehicle in England and Wales, although their employment consequences may be more severe. Scotland uses different, lower limits; this page concerns England and Wales only.

A separate offence under section 5(1)(b) applies where a person is in charge of a motor vehicle while over the prescribed limit. This can cover a person who is not proved to have driven, but had control or responsibility for the vehicle. Whether someone was in charge depends on the circumstances, including their location, possession or access to keys, and what they were doing. Unlike driving over the limit, there is a statutory defence where the person proves there was no likelihood of their driving the vehicle while still over the limit.

For driving or attempting to drive, the prosecution must prove the relevant driving, an attempt to drive, a road or other public place, and alcohol over the prescribed limit in an evidential specimen. In an in-charge case, it must prove the person was in charge rather than merely present near a vehicle. The prosecution normally relies on police witnesses, custody records, the approved testing machine printout and any relevant admissions, CCTV, body-worn video or civilian evidence. The evidential result, rather than the roadside screening result, is the central scientific evidence.

Many cases begin with a preliminary roadside breath test. Police may require one where they reasonably suspect alcohol has been consumed, where a moving traffic offence has been committed, or following a collision. A roadside device is a screening tool and does not itself establish the prosecution reading. After arrest, the usual station procedure involves an approved evidential breath-testing machine. Two breath specimens are normally requested, and the lower reading is used. In defined circumstances, including machine, medical or reading-related issues, blood or urine procedures may instead be used.

Technical rules matter, but a procedural issue does not automatically end a prosecution. The real question is generally whether the legal requirements were met and whether any failure undermines the admissibility or reliability of the evidence. Possible issues can include the sequence of the procedure, statutory warnings, machine operation, a genuine inability to provide a requested specimen, or evidence that alcohol was consumed after driving. The latter is often called a post-driving consumption or “hip flask” defence, but it requires a credible factual account and evidence capable of showing that the alcohol level at the time of driving was not over the limit.

Drink driving can overlap with other offences. Bad driving, a collision, injury, drugs, lack of insurance, driving while disqualified or failing to provide a specimen can lead to separate allegations. A drink driving conviction does not require proof of poor driving, but poor driving or a collision may substantially increase sentence. Conversely, a person who was not over the prescribed limit may still face an allegation of driving while unfit through drink under a different provision if the evidence supports it.

You may be charged at the police station on the day, particularly following an evidential breath result, or charged later by a postal requisition. Summary-only road traffic matters generally have to be commenced within 6 months of the offence. A later charge is therefore possible, especially where blood needed laboratory analysis or further evidence had to be obtained.

A delay does not by itself show that a case has been dropped. Keep the police paperwork and make sure address details are current. Ignoring a postal requisition can result in the court dealing with the case in your absence or taking steps to secure attendance.

Once charged, the papers will give a date for the first appearance in the magistrates' court. Attendance matters: drink driving cannot normally be dealt with entirely by post, and a court can issue a warrant where a defendant fails to attend without an adequate explanation.

The period before the hearing can be used to obtain legal advice, preserve notes about the incident, identify witnesses and collect documents relevant to mitigation. If the allegation is disputed, the first hearing is normally where a not guilty plea is entered and the case is prepared for trial.

Where a blood specimen is taken, the procedure allows for a portion to be made available so it can be independently analysed. Acting promptly matters because samples degrade over time, and an independent analysis can occasionally support a challenge to the prosecution figure.

Independent testing is not automatically necessary or helpful in every blood case. The practical value depends on the result, handling records, timing and the issue genuinely raised. Legal advice can help identify whether analysis is proportionate and how the retained sample should be dealt with.

If you are convicted or sentenced and wish to appeal to the Crown Court, the notice of appeal generally has to be lodged within 21 days of the decision. An appeal from the magistrates' court is ordinarily a rehearing in the Crown Court, rather than simply a review of paperwork.

Late appeals need permission and a good reason, so the issue needs consideration quickly. An appeal can have risks as well as potential benefits, including the possibility of a different sentence, and individual advice is important before taking that step.

Where the court offers a drink-drive rehabilitation course, it will specify the period in which the course must be completed. The reduction in disqualification is conditional on successful completion within that time. Missing enrolment, attendance or completion requirements can mean the original end date of the ban remains in force.

The course does not restore a licence immediately and does not remove the need to meet any DVLA relicensing requirements. It is sensible to keep written confirmation of completion and check the applicable reduced disqualification date.

A conviction for driving or attempting to drive over the limit brings a minimum 12-month disqualification. If there has been a previous drink driving conviction within the past 10 years, the minimum rises to 3 years. The ban starts when the court imposes it, and the licence must be surrendered as directed.

The precise length depends particularly on the alcohol reading and on aggravating features. These can include an accident, poor driving, carrying passengers, driving a vehicle used for commercial purposes, relevant previous convictions, or an attempt to evade police. A lack of previous convictions, genuine remorse and evidence of constructive steps may mitigate the overall sentence, but do not remove the statutory minimum ban.

The court can impose an unlimited fine. In practice, fines are calculated from weekly income using Sentencing Council bands, with higher readings and aggravating features tending to increase the amount. The court considers means, so accurate financial information is important.

A victim surcharge and prosecution costs are usually added on top. The court may allow payment by instalments, but non-payment can lead to enforcement action. The fine is separate from the substantial private costs that can follow, including transport, employment and insurance consequences.

High readings, poor driving, a collision or a very high alcohol level can move the case into a community order or even custody of up to 6 months in the magistrates' court. Unpaid work, curfews, supervision and rehabilitation-related requirements are among the possible community order outcomes.

Custody is not inevitable simply because a reading is high, but the risk increases with serious aggravating features, repeat offending and evidence of danger to others. A collision causing injury may also lead to more serious separate offences, with sentencing consequences beyond the ordinary section 5 offence.

The in-charge offence under section 5(1)(b) is treated less seriously than driving or attempting to drive. It carries 10 penalty points or discretionary disqualification rather than a mandatory ban, plus a fine. The court can consider whether there was any real likelihood of driving.

The statutory no-likelihood defence makes the facts important. For example, the location of the keys, plans for transport, where the person was sitting and how long they intended to remain can all be relevant. It is not enough merely to say that no driving was intended; the defence has to be established on the evidence.

Where the disqualification is 12 months or more, the court can offer a drink-drive rehabilitation course. If it is completed successfully, the ban is reduced by up to a quarter, typically around three months off a 12-month ban.

The offer is for the court to make at sentence and is not an entitlement in every case. The reduction takes effect only after completion; it does not permit driving before the reduced end date or override any separate DVLA medical requirement.

A drink driving conviction is ordinarily recorded as a DR10 endorsement on the driving record for 11 years. The endorsement and disqualification can affect driving-related jobs, fleet eligibility, overseas vehicle hire and professional licences. New drivers are not subject to a lower alcohol threshold, but the loss of a licence can be especially disruptive where driving experience is limited.

High readings or repeat offending can place a person within the High Risk Offender scheme. This means a medical assessment before the licence is returned. The licence is not automatically restored simply because the disqualification period has elapsed, and a delay in dealing with DVLA requirements can postpone lawful driving.

Beyond sentence, expect sharply higher insurance premiums for several years, the cost of any required medical or High Risk Offender assessment before relicensing, and the practical impact of being unable to drive for work or caring responsibilities. Insurers commonly ask about motoring convictions and must be answered accurately.

Employment consequences vary. Some employers may be able to make temporary adjustments, while others may regard a valid licence as essential to the role. A mandatory ban cannot generally be avoided on the basis of exceptional hardship, unlike some points-based disqualifications, although the wider consequences can form part of mitigation on other aspects of sentence.

An officer can require a preliminary breath test if they reasonably suspect alcohol has been consumed, if a moving traffic offence has been committed, or if there has been a collision. The roadside device gives a pass or fail indication only. It is a screening tool, not the evidential reading relied on for the section 5 charge.

Failing the test, or refusing it without a reasonable excuse, commonly leads to arrest. The circumstances of the stop, observations made by officers and any driving evidence may later be included in the prosecution case or used at sentence.

After a positive or refused roadside test, a person is generally arrested and taken to a police station. The custody process includes a record of arrival, welfare matters, rights and detention decisions. It is important to tell custody staff about medical conditions, medication, injuries or language needs.

Free and independent legal advice is available at the station, by telephone or in person. A person may ask for it before deciding how to respond to police questions. The fact that advice is requested is not evidence of guilt.

At the station, an officer uses an approved evidential breath-testing machine and follows a prescribed procedure. This includes explanations, warnings and questions that may address matters such as recent drinking, medical issues and ability to provide a specimen.

Two specimens of breath are normally requested. The lower reading is the evidential figure. The machine produces a printout, and the custody record should document the procedure. The roadside result does not replace this evidential process.

If the breath machine is unavailable or unreliable, if a reading falls within a relevant low range, or where there is a medical reason, police may require a blood or urine specimen instead. Blood is taken by a healthcare professional. The legal procedure and warnings differ from the breath process.

With blood, a portion may be available for independent analysis. A person who genuinely cannot provide the required specimen because of a medical condition needs to raise that issue clearly and promptly, ideally with supporting medical evidence where it exists. A mere preference for one type of sample does not necessarily control the procedure.

If an evidential result is over the limit, a charge may be brought immediately. Where laboratory analysis is needed, particularly in a blood case, the person may instead be released and later receive a postal requisition. The paperwork identifies the allegation and the court date.

A person may be released on bail or under investigation while evidence is completed. It is important to read and comply with any conditions and retain all documents, including the evidential printout where one has been provided.

Before the first hearing, the prosecution material, custody record and any scientific evidence can be considered. A disputed case may require witnesses, expert evidence or disclosure requests. Notes made soon after the event can be useful, especially where the account concerns post-driving drinking, the identity of the driver or the in-charge defence.

Where the allegation is admitted, preparation may focus on reliable mitigation: income information, references, evidence of employment or caring responsibilities, and evidence of alcohol support or counselling where relevant. Such material should be accurate and should not exaggerate the position.

At the magistrates' court, the defendant enters a plea. On a guilty plea, the court may sentence immediately or adjourn for reports or further information. On a not guilty plea, the court identifies the issues, gives directions for evidence and lists a trial.

The court must apply the mandatory disqualification for driving or attempting to drive over the limit if there is a conviction. A not guilty plea is not itself a reason for harsher sentence, but an early guilty plea can be relevant to the reduction available for the punitive parts of sentence.

At trial, the prosecution has to prove the case. The court hears the admissible evidence and decides whether it is sure of guilt. If acquitted, no drink-drive sentence follows. If convicted, the court considers the reading, aggravating and mitigating features, financial means and any relevant reports before passing sentence.

The court will state the disqualification period and may offer the rehabilitation course where eligible. At the end of a ban, driving does not resume automatically unless the licence position has been properly restored and any DVLA medical requirement has been satisfied.

Ask for free, independent legal advice as soon as you are in custody. It can help ensure that medical concerns and procedural issues are recorded, and it gives an opportunity to understand the immediate process before answering substantive police questions.

As soon as practical, write down what was drunk, when it was consumed, when driving ended, the route, the stop, and what happened at the station. Include food, medication, health symptoms and any alleged drinking after driving. Contemporaneous notes are generally more reliable than recollection months later.

Keep the breath printout, charge sheet, bail paperwork, postal requisition and any custody-related papers. These documents can show readings, timings, warnings and the precise allegation, all of which may be relevant to legal review or mitigation.

Preserve potential evidence before it disappears. This may include messages, receipts, taxi bookings, location data, CCTV requests, names of people present and evidence relating to who had the vehicle keys. The point is not to create an account after the event, but to retain material that can objectively confirm or test one.

If asthma, lung disease, anxiety, injury, diabetes, medication or another condition affected the ability to provide a specimen, make this known during custody and record the details. A medical explanation needs to be genuine and may require evidence; it is not a general right to decline a requested specimen.

A guilty plea may be appropriate in many cases, but it is sensible to understand the evidence and consequences first. A brief legal review can distinguish a realistic evidential issue from a point that is unlikely to affect the outcome.

Where conviction is likely, gather income evidence, references and documents showing genuine responsibilities or employment effects. Evidence of constructive action, such as alcohol education, counselling or treatment where appropriate, can provide context. A mandatory ban remains mandatory, but preparation can assist with other sentencing decisions.

If a ban of 12 months or more is anticipated, the drink-drive rehabilitation course can be raised with the court or through a representative. Successful completion can reduce the ban by up to a quarter, but only if the court makes the offer and the course is completed within the stated period.

Arrange lawful alternatives for travel, work and caring commitments early. Do not assume that a short journey, an emergency or an employer's request makes driving during disqualification lawful. Check the licence position with DVLA before returning to driving after a ban.

Refusing to provide a breath, blood or urine specimen without a reasonable excuse is a separate offence that often carries worse penalties than drink driving itself. People sometimes believe refusal prevents the police obtaining a reading, but it usually creates a different and serious charge.

A genuine inability for medical reasons can be relevant, but it should be raised clearly and supported where possible. Simply refusing because the consequences are feared is unlikely to amount to a reasonable excuse.

Even a reading just over 35 micrograms triggers a mandatory ban for driving or attempting to drive. There is no “nearly under” allowance once the evidential result exceeds the statutory limit.

A borderline result may make it especially important to check the actual procedure and evidence, but it does not mean the court can disregard a proven offence merely because the excess is small.

Alcohol can remain in the body the following morning. People commonly assume that sleep, coffee, food, a shower or feeling sober ensures they are below the limit, but none is a reliable legal test.

The offence is based on the evidential alcohol level at the relevant time. The safest practical approach is not to estimate fitness to drive from how someone feels after drinking.

The station procedure has detailed requirements, and it can be sensible to have the printout, timings, custody record and any blood procedure reviewed before a plea is finalised. People may assume a scientific result cannot ever be examined.

Equally, not every minor irregularity provides a defence. A proper review helps avoid both missing a genuine issue and pursuing an unrealistic technical argument.

Sleeping in a car, waiting in it, or sitting with keys nearby can lead to an in-charge allegation even if there is no proof of driving. People often assume that a parked vehicle ends the risk.

The in-charge offence has different penalties and a specific no-likelihood-of-driving defence, so the distinction can be important. The surrounding facts should be recorded carefully.

Loss of work, rural transport problems, childcare and caring duties can be serious consequences, and courts can take them into account in mitigation. However, a mandatory drink-drive disqualification is not ordinarily avoided through the exceptional hardship argument used in some penalty-points cases.

Misunderstanding this can lead people to make unrealistic plans around continuing to drive. The focus may instead be on accurate mitigation, rehabilitation eligibility and practical transport arrangements.

Some drivers take “just one short trip” while disqualified, perhaps to get to work or deal with a family emergency. Driving while disqualified is a serious separate offence and can lead to further punishment, including possible custody.

It can also create insurance problems and undermine mitigation in any later proceedings. The ban must be observed until the person is legally entitled to drive again.

A conviction is not only a court matter. It may have to be disclosed to insurers when asked, and a DR10 endorsement can affect cover and price for years. Failure to answer insurers accurately can jeopardise a policy.

Those subject to High Risk Offender procedures can also face a medical assessment before relicensing. Leaving licence administration until the end of the ban can delay a return to lawful driving.

Early advice from a regulated solicitor with motoring-law experience can be particularly valuable in any allegation of driving or attempting to drive over the limit, because conviction brings a mandatory disqualification. The station is an important stage: free and independent legal advice is available in custody, and a solicitor can explain the procedure, record concerns and advise on the immediate position. Taking that advice does not itself indicate guilt.

Prompt specialist review may be important where the reading was close to the limit, blood or urine was taken, there was an alleged failure to provide, a medical condition affected the ability to give a specimen, or there is a genuine account of drinking after driving. It can also matter where there is a dispute over who was driving, whether the location was a road or public place, or whether an allegation is properly one of driving rather than being in charge.

Legal help can also be useful before a first court hearing where a guilty plea is being considered, particularly for high readings, a collision, a passenger, previous convictions, professional driving work, or risks to employment and family responsibilities. A representative can obtain and assess prosecution material, identify whether a trial issue exists, and present mitigation accurately. A court cannot avoid a mandatory drink-drive ban because it would cause hardship, but those circumstances can still be relevant to the overall sentence.

Advice after sentence may be needed where there is a question about an appeal, the rehabilitation course, relicensing, a High Risk Offender medical, or the effect on insurance and employment. The general 21 days for an appeal to the Crown Court makes it important not to delay if the decision is being considered.

The limits are 35 micrograms of alcohol per 100ml of breath, 80mg per 100ml of blood, and 107mg per 100ml of urine. The relevant figure is normally the evidential specimen taken at the police station, not the initial roadside screening result.

There is no dependable number of drinks that guarantees a person will remain under the limit. Alcohol absorption and elimination vary with the person, the drinks, food, time and other factors. Scotland has lower limits, so the position differs there.

Driving or attempting to drive over the limit carries a minimum 12-month disqualification. A previous drink driving conviction within the last 10 years raises the minimum to 3 years.

The actual ban can be longer depending on the reading and aggravating features such as poor driving, a collision, passengers or relevant convictions. If offered and completed successfully, a rehabilitation course can reduce an eligible ban by up to a quarter.

Possibly. A person can commit the section 5(1)(b) offence of being in charge of a motor vehicle while over the limit even if they are not proved to have driven. Keys, the person's position, access to the vehicle and the surrounding circumstances can all matter.

The in-charge offence carries 10 penalty points or discretionary disqualification rather than a mandatory ban. There is a defence if the person proves there was no likelihood of driving while still over the limit.

Where two evidential breath specimens are given at the station, the lower of the two readings is used. This is distinct from the roadside device, which is a preliminary screening test rather than the evidential result for court.

In certain circumstances, a blood or urine procedure may be used instead. The applicable process depends on the circumstances, including the machine, the reading and medical issues.

Refusing a roadside screening test without a reasonable excuse will commonly lead to arrest. Refusing an evidential specimen at the police station can lead to a separate failing-to-provide allegation, often with the same or harsher consequences than the ordinary drink-driving offence.

A genuine medical reason may amount to a reasonable excuse, but this is fact-sensitive and often requires supporting evidence. It is important to explain a genuine inability at the time rather than simply declining to cooperate.

For a first offence with a modest reading and no serious aggravating features, custody is less likely than a fine and disqualification. However, the magistrates' court can impose up to 6 months in custody.

Community orders or custody become more likely with very high readings, dangerous or poor driving, a collision, injury, repeat offending or other serious features. A separate offence may arise where a collision causes injury.

It can sometimes be possible to challenge the evidence, for example where there is a genuine issue about the evidential procedure, machine reliability, the ability to provide a specimen, or alcohol consumed after driving. The evidential printout, custody record and officer evidence can be important.

Challenges are technical and fact-specific. A minor procedural point will not necessarily defeat an otherwise reliable prosecution, so an evidence-based legal review is more useful than assuming either that a reading is unchallengeable or that every error is fatal.

This describes a situation where a person says alcohol was consumed after driving ended, so that the specimen result does not reflect their alcohol level while driving. It can be relevant because the prosecution must prove the alcohol level at the time of driving or attempting to drive.

The account must be credible and capable of being tested against timing, witnesses, receipts, messages, CCTV and expert evidence where appropriate. It is not a simple defence created by saying that drinking occurred after the event.

An arrest, roadside test or charge does not itself normally create a drink-drive disqualification. The mandatory ban follows conviction for driving or attempting to drive over the prescribed limit, when the court passes sentence.

Once a court imposes the disqualification, driving must stop immediately unless the court has made a different lawful order. At the end of the ban, relicensing may still require action through DVLA and, in some cases, a medical assessment.

The drink-driving law applies to the driver regardless of who owns the vehicle. A company car, hire vehicle or borrowed car does not provide a different alcohol limit or avoid the ordinary criminal consequences.

There may be additional contractual and employment consequences. A company policy, fleet insurer, hire agreement or employer may require notification, and a disqualification can affect whether the person remains authorised to drive for work.

England and Wales do not have a separate lower statutory drink-drive limit for new drivers or professional drivers. The same prescribed limits apply to cars, motorcycles, vans and larger vehicles for the section 5 offence.

In practice, professional consequences may be greater for someone whose job requires a licence, passenger transport or fleet driving. A learner driver can also be prosecuted and disqualified in the same way as any other driver.

There is no fixed increase, but a drink driving conviction commonly makes insurance significantly more expensive and can reduce the number of insurers willing to quote. A conviction for driving with alcohol above the limit is ordinarily recorded as a DR10 endorsement for 11 years.

Insurers must be answered truthfully when they ask about convictions or endorsements. The long-term insurance cost can exceed the court fine, and specialist cover may be needed in some cases.

The endorsement is recorded on the driving record; a DR10 is ordinarily retained for 11 years. This can affect employers, fleet operators and insurers who are entitled to check driving information with consent or through the relevant process.

Other countries, foreign insurers and overseas hire companies apply their own rules. A conviction in England and Wales may therefore affect travel or vehicle hire, but the specific consequence depends on the destination and provider. Scotland and Northern Ireland have different legal systems and rules in some respects, so local advice may be needed for incidents there.