Fellow Shadow Watchers, As a teacher within the UK educational system I went entirely metric from the late 60's. If school examinations were to be exclusively metric there was no choice. Everything in Imperial Measure was ruthlessly discarded; not a rod, pole, perch, peck or bushel in sight: and so I remained until retirement.
Left to myself I've reverted to 'use whatever is most convenient mode' with feet and inches for 'human scale meaurements' and millimetres for most small things in the workshop. Centimeters were banned from secondary schools and that taboo has stuck. There's a FAX from my metal supplier on my desk this minute quoting for Brass CZ108 1/2 hard 1 off 480mm x 175mm x 5/8" and this 30-ish years after Imperial measurements were supposed to have been discarded. The US of course still use Queen Anne's gallon which the Imperial system replaced with a larger unit later on. We often forget this when comparing fuel prices. The big bit of brass?....it's for 'the world's first aggressive gnomon'!! Tony Moss