Cambridgeshire Police are warning motorists about the dangers of driving the morning after a night drinking.
The force says many people don’t realise they could still be over the limit.
The annual Christmas crackdown is underway – with extra patrols being mounted throughout December.
On average it takes about one hour per unit of alcohol to leave the body a large glass of wine or a pint of strong beer is about three units.
More information can be found on the force website HERE