No more than 4
Came across this poster advising Scots drivers to watch their drinking if getting behind the wheel.
22 May 2015 | 1
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.

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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.