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Having had to explain the concept of a dozen to a girl in a bakery in London some years ago, I don't think the self congratulation on the Imperial system is warranted (and I didn't even want to start trying to explain to her the concept of a Baker's Dozen).
But Britain was supposed to go metric 120 odd years ago in return for making Greenwich the Prime Meridian. I know the British Civil Service can be slow but that's really pushing new boundaries.
