I have been pulled by a roadblock and breathalysed...hadn't had a drink for 48 hours but the cop said that the car smelled of alcohol, I should think it did, my middle aged, dinner jacketed DH and his mates had just been for a night out and I was taking them home. They were all in high and hilarious spirits and ribbed the policeman unmercifully. I managed to reverse over and destroy a bollard (not my fault, he told me to reverse and didn't move the bollard)
I dont mind being pulled but wonder if that's the best use of police time if they have no reason to think that the driver has been drinking.