The legal limit in England and Wales is:
- 35 micrograms of alcohol in 100 millilitres of breath; or
- 80 milligrams of alcohol per 100 millilitres of blood; or
- 107 milligrams of alcohol per 100 millilitres of urine
The legal limit in Scotland is:
- 22 micrograms of alcohol in 100 millilitres of breath; or
- 50 milligrams of alcohol per 100 millilitres of blood; or
- 67 milligrams of alcohol per 100 millilitres of urine
The Scottish drink drive limit was lowered on 5th December 2014.