What's the drink-driving limit in the UK?
The UK doesn't have one drink-driving limit — it has two. In England, Wales and Northern Ireland the limit is 80mg of alcohol per 100ml of blood (0.08%), one of the highest in Europe. But in Scotland it's lower, at 50mg (0.05%) — the same as Australia. Here's what the numbers mean, what happens if you're caught, and what to watch for if you're driving in Britain on an Aussie licence.
The limits: 0.08% in most of the UK, 0.05% in Scotland
The UK measures drink-driving the same way Australia does — by the concentration of alcohol in your blood — but it's usually quoted in milligrams per 100 millilitres rather than as a percentage. The headline point is that the limit is not the same across the four nations.
In England, Wales and Northern Ireland the limit is 80mg of alcohol per 100ml of blood, which is the same as 0.08% BAC. In Scotland, the limit was cut to 50mg per 100ml of blood — 0.05% — on 5 December 2014, bringing it into line with most of mainland Europe and with Australia's general limit. The breath and urine figures the police actually test against differ accordingly.
| Measured in | England, Wales & NI | Scotland |
|---|---|---|
| Blood | 80 mg / 100ml (0.08%) | 50 mg / 100ml (0.05%) |
| Breath | 35 µg / 100ml | 22 µg / 100ml |
| Urine | 107 mg / 100ml | 67 mg / 100ml |
These figures come straight from the UK government's drink-drive limit guidance. The breath number is the one that matters most day to day, because a roadside breath test is what police use first — and a reading at or above the limit is enough for the offence on its own.
Why England sits so high — and why that's controversial
At 0.08%, England, Wales and Northern Ireland have one of the most lenient drink-driving limits in Europe, where 0.05% or lower is the norm. Scotland's 2014 cut was expected to be followed by the rest of the UK, and road-safety bodies have long campaigned for it, but England, Wales and Northern Ireland have stayed at 80mg. The practical upshot for a driver is simple: the legal headroom in most of the UK is larger than in Australia, but the impairment that comes with it is exactly the same — and so is the risk.
The penalties are serious everywhere in the UK
The limit varies by nation, but the penalties are consistent and heavy across the UK. They apply whether you were caught at 0.05% in Scotland or 0.08% in England.
| Offence | Prison | Fine | Driving ban |
|---|---|---|---|
| Driving or attempting to drive over the limit | up to 6 months | unlimited | at least 1 year (3 years if twice in 10 years) |
| Being in charge of a vehicle while over the limit | up to 3 months | up to £2,500 | possible ban |
| Refusing to give a breath, blood or urine sample | up to 6 months | unlimited | at least 1 year |
| Causing death by careless driving when over the limit | up to life | unlimited | at least 5 years + extended retest |
The figures above are the maximums set out by the UK government's drink-driving penalties guidance; the actual sentence is up to the court. Note the second row: you can be prosecuted for being "in charge" of a vehicle while over the limit even if you weren't driving — sleeping it off in the driver's seat with the keys to hand has caught plenty of people out. Beyond the court penalty, a conviction pushes up insurance costs for years and can complicate travel to countries such as the United States.
How many drinks is the limit?
There's no honest answer, and the UK government doesn't try to give one. Its own guidance states plainly that it's impossible to say how many drinks the limit equals because "it's different for each person" — depending on your weight, age, sex, metabolism, how much you've eaten and even your stress levels, as well as the strength of what you're drinking.
That's doubly true across a border where the limit itself changes. A rough guide that keeps you legal in England could easily put you over in Scotland. The only approach that works in every part of the UK is the one the law is built around: if you're driving, don't drink.
Driving in the UK on an Australian licence
Australian visitors can generally drive in Great Britain on a current full Australian licence for the length of a typical visit — up to 12 months. Because your licence is already in English, you don't need an International Driving Permit to go with it. The Smartraveller advice for the United Kingdom covers the current requirements and is worth checking before you go, especially if you plan to hire a car.
What a foreign licence does not do is give you any leeway on the limit. Whichever nation you're driving in, the local drink-driving limit applies to you exactly as it does to a resident. And there's a financial sting on top of the criminal one: most travel-insurance policies and hire-car agreements exclude cover if you were over the legal limit, so a drink-driving crash can leave you personally liable for the damage as well as facing prosecution.
The morning after still counts
Your body clears alcohol slowly — on average only about one standard drink an hour — and nothing speeds it up. Coffee, a fry-up, a shower and a solid sleep can make you feel sharper, but they don't lower your blood alcohol. After a big night it's genuinely easy to still be over the limit well into the next morning, and that's even more of a risk in Scotland, where the lower 0.05% limit means you cross back under it later. If you drank late, do the maths before you pick up the keys — or leave the car.
How the UK compares
| Country / nation | General limit | Notes |
|---|---|---|
| England, Wales & NI | 0.08% (80mg) | Among the highest limits in Europe |
| Scotland | 0.05% (50mg) | Lowered from 0.08% in December 2014 |
| Australia | 0.05% | Zero for learner and provisional drivers |
| Ireland | 0.05% | 0.02% for learner, novice and professional drivers |
| Most of Europe | 0.05% | Several countries use 0.02% or zero |
If you're used to Australia's 0.05, Scotland will feel familiar — but England, Wales and Northern Ireland give you more legal room than home, which is exactly where the danger lies. A higher limit doesn't make the extra drink any safer; it just makes it legal.
Frequently asked questions
What is the drink-driving limit in the UK?
In England, Wales and Northern Ireland it's 80mg of alcohol per 100ml of blood (0.08%), or 35 micrograms per 100ml of breath. In Scotland it's lower — 50mg per 100ml of blood (0.05%), or 22 micrograms per 100ml of breath.
Is the drink-driving limit different in Scotland?
Yes. Scotland cut its limit to 0.05% (50mg) on 5 December 2014, in line with most of Europe and with Australia. The rest of the UK stayed at 0.08%, so the same drink can be legal on one side of the border and an offence on the other.
How many drinks can I have and still drive in the UK?
There's no safe number — the UK government says it's impossible to say, because it's different for everyone depending on weight, sex, metabolism, food and the drink itself. If you're driving, treat it as zero.
What are the penalties for drink-driving in the UK?
Driving over the limit carries a minimum 12-month ban, an unlimited fine and up to 6 months' prison. Refusing a sample is the same. Causing death by careless driving while over the limit can bring up to life imprisonment.
Can I drive in the UK on my Australian licence?
Generally yes, on a current full Australian licence for up to 12 months, with no International Driving Permit needed because it's in English. The local limit applies to you fully, and driving over it can void your travel insurance and hire-car cover.