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Alcohol and Drug Limits
- 1/15The legal breath alcohol limit for driving in England and Wales
35 microgrammes/100 millilitres of breath: In England and Wales, the legal breath alcohol limit is 35 microgrammes per 100 millilitres of breath. Exceeding this limit significantly impairs driving abilities and is illegal.
The blood alcohol limit for drivers in England, Wales, and Northern Ireland
80 milligrams of alcohol per 100 millilitres of blood: The legal blood alcohol limit for drivers in England, Wales, and Northern Ireland is 80 milligrams of alcohol per 100 millilitres of blood. This is equivalent to 0.08% BAC.
The blood alcohol limit for drivers in Scotland
50 milligrams of alcohol per 100 millilitres of blood: Scotland has a lower blood alcohol limit compared to the rest of the UK, set at 50 milligrams of alcohol per 100 millilitres of blood (0.05% BAC).
The breath alcohol limit for drivers in Scotland
22 micrograms per 100 millilitres of breath: Scotlands breath alcohol limit is 22 micrograms of alcohol per 100 millilitres of breath, which is lower than in other parts of the UK.
The blood alcohol limit for novice drivers in the UK
20 milligrams per 100 millilitres of blood (0.02% BAC): Novice drivers in the UK are subject to a stricter blood alcohol standard of 20 milligrams per 100 millilitres of blood (0.02% BAC).
The blood alcohol limit for professional drivers in the UK
50 milligrams per 100 millilitres of blood (0.05% BAC): Professional drivers in the UK must adhere to a blood alcohol limit of 50 milligrams per 100 millilitres of blood (0.05% BAC).
The urine alcohol limit for drivers in England
107 milligrams per 100 millilitres of urine: The urine alcohol limit for drivers in England, Wales, and Northern Ireland is 107 milligrams per 100 millilitres of urine.
The urine alcohol limit for drivers in Scotland
67 milligrams per 100 millilitres of urine: The urine alcohol limit for drivers in Scotland is 67 milligrams per 100 millilitres of urine, aligning with its lower overall alcohol limits.
A controlled drug that is illegal to drive with if found above a specified level in your blood in the UK
Both illegal drugs (e.g., Cannabis, Cocaine, MDMA) and specific prescription medications (e.g., Methadone, Diazepam): It is illegal to drive with specified levels of various controlled drugs in your blood, including both commonly known illicit drugs and certain prescription medications.
The threshold limit for Cannabis in blood when driving in the UK
2µg/L: The threshold limit for Cannabis (a controlled drug) in the blood when driving in the UK is 2 micrograms per litre (µg/L).
The threshold limit for Cocaine in blood when driving in the UK
10µg/L: For Cocaine, the specified threshold limit for driving in the UK is 10 micrograms per litre (µg/L) in the blood.
The threshold limit for MDMA (ecstasy) in blood when driving in the UK
10µg/L: The specified threshold limit for MDMA (ecstasy) in the blood for driving in the UK is 10 micrograms per litre (µg/L).
The threshold limit for Ketamine in blood when driving in the UK
20µg/L: The threshold limit for Ketamine in the blood when driving in the UK is 20 micrograms per litre (µg/L).
A controlled drug with a threshold limit of 1µg/L in blood for driving in the UK
Lysergic acid diethylamide (LSD): Lysergic acid diethylamide (LSD) has one of the lowest threshold limits, set at 1 microgram per litre (µg/L) in the blood for driving in the UK.
The threshold limit for 6-monoacetylmorphine (heroin) in blood when driving in the UK
5µg/L: The threshold limit for 6-monoacetylmorphine (heroin) in the blood when driving in the UK is 5 micrograms per litre (µg/L).