Frequently Asked Questions

You must not drive with

• breath alcohol level higher than 35 micrograms / 100 millilitres
• blood alcohol level of more than 80 milligrammes / 100 millilitres
• urine alcohol level of more than 107 milligrammes / 100 millilitres.

However, due to many different factors, we would advise the only safe limit is not to drink at all when you have to drive. Remember, you may still be unfit to drive in the evening after drinking at lunchtime, or in the morning after drinking the previous evening.

If at any stage you have concerns over the behaviour of another driver, for example, if you think they have been driving while over the legal alcohol limit or driving erratically, you should contact the police as soon as possible.