Came across this poster advising Scots drivers to watch their drinking if getting behind the wheel.

The advice is to watch that fifth pint!
The poster dates back to the early 70s.
Last year the Scottish Government lowered its drink-drive limit to that of the Irish – 50mg per 100ml of blood – while England held back on any change to the present limit of 80mg per 100ml of blood.
This image appeared on reddit.com/r/ireland a few weeks ago and it was pointed out that it’s a joke from a book published in recent years.