Listening to programme about Barbara Castle who introduced the breathalyzer legislation in 1966. Furious driver asks how dare she spoil his fun and he drives at his best with 5 pints in him. Drivers don't quite have that same sense of entitlement - not even Jeremy Clarkson would demand the right to drink 5 pints and drive.
Castle didn't drive, which really infuriated the drivers (also that she was a woman).
Qualification for Minister of Transport - not having a driving licence.