12 penalty points ≠ ban

Just so we know the facts:
from: http://www.publications.parliament.uk/pa/cm201011/cmselect/cmtran/writev/460/m37.htm

Drivers with a BAC of between 0.02 and 0.05 have at least a three times greater risk of dying in a vehicle crash than drivers with no alcohol in their blood. This risk increases to at least six times with a BAC between 0.05 and 0.08, and to 11 times with a BAC between 0.08 and 0.10.
the limit is currently 0.08. Food for thought.