Would it be Inches or Centimetres today, Sir?

The English live in a perpetual dilemma. Will it be patriotic inches or European centimetres? Will it be a united Europe (God-forbid) where everyone reads Proust, eats olives and frankfurters and sunbathes at the Med on 180cm IKEA towels, or will it be tea drank while wondering lonely-as-a-cloud in pleasant rain-drenched fields dotted with Wordsworth's daffodils. No centimetres, please, we are British.

But why choose? This Carpenter pencil I found in Paperchase solves the dilemma once and for all. It is made by Kirin Japan and doubles as a ruler with inches on one side and centimetres on the other. Would it be inches or centimetres today, Sir? I'll have both, thank you Jeeves.