As said, it varies for different people. I was breathalysed after having a big meal with two pints of Aspalls cider - started drinking around 7pm, stopped around 11pm, got in the car around 1:30am, was breathalysed shortly afterwards and was well under, as I suspected I would be. I wouldn't just neck 2 pints of strong cider and get straight behind the wheel though, as I reckon that would put me over.
I'm 6' tall, fairly skinny, and a regular drinker although I'm not sure how much difference the latter makes.
I'm 6' tall, fairly skinny, and a regular drinker although I'm not sure how much difference the latter makes.