The law

In England, Wales and Northern Ireland, the legal alcohol limit for drivers is:

• 35 micrograms of alcohol per 100 millilitres of breath
• 80 milligrams of alcohol in 100 millilitres of blood
• 107 milligrams of alcohol per 100 millilitres of urine

However it is not possible to say how much alcohol you can drink and stay below the limit. The way alcohol affects you depends on:

• your weight, age, sex and metabolism (the rate your body uses energy)
• the type and amount of alcohol you’re drinking
• what you’ve eaten recently
• your stress levels at the time

So if you’re driving, it’s better to have none for the road.