Units minus time

On Sunday, fielding in the gully, I passed some of the time between balls calculating how many pints of bitter I could allow myself when it was our turn to bat and drive home without being wildly over the limit. The arithmetic was fairly simple: the number of pints consumed, multiplied by two for the number of ‘units’, minus one unit metabolised for every hour we’d been playing. The delicious egg-and-cress sandwiches we’d stuffed down our throats at tea allowed me to massage the final figure slightly upwards. Though it behoved me, too, to take into account that I’d put one or both of my contact lenses in inside-out that morning and the world was a blur drunk or sober.

The Alcohol Awareness course I’d been on the last time I was banned from driving taught me how to make the units-minus-time calculation. On the floor of the classroom was a large clock-face.