The region's police forces are starting their annual campaigns against drink driving. Last Christmas Avon and Somerset Police stopped nearly 12,000 vehicles and 231 people gave positive breath or drug tests.
Officers are calling on people to dial 999 if they see someone getting behind the wheel while under the influence.
More top news
Heavy showers overnight, hail and thunder possible, humid
Heavy showers overnight, humid, thunder possible
The Maltings shopping centre was closed to the public after a small amount of the Novichok substance was found in the area.