UK is a right mix(ed up) place when it comes to measuring stuff. Many of us on here are of an age when we learnt Imperial measurements early in school and then had to swap to metric later - so know and use both.
Our kids just roll their eyes in disbelief when they come into contact with Imperial measurements. They think the US is living in the "Dark Ages".
I use lbs and ozs for baking/cooking and Kgs for camp gear and anything scientific. Dress making I use both, knitting I use metric. Hills/navigatiion I use metric but car travel - miles etc. etc. ........

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Most of us, I think use metric for outdoors gear. Cubic inches for volume is just "hopeless"
The reason we still use Miles for distance measurement in the UK was because of a poll held sometime around 1969 or early 1970, by the extremely popular BBC TV program of the time "Nationwide", which ran from 1969 to 1983.
You have to remember there were only three TV channels in the UK back then (BBC1, BBC2 and ITV), so viewers had infinitely less choice than today and consequently viewer figures for programs like Nationwide were very large, and hence could influence government policy.
They asked viewers to phone or write in to say if they would prefer to go over to Km/h or stick with mph...An overwhelming number of viewers voted to stick with mph, at least 80% or more as I recall. The government listened, and so we did.
Heights should therefore still be measured in Feet, which is related to the Mile, not in meters which is basically meaningless as a measurement of height...In the UK heights only really make sense in Feet. (Plus it makes things sound 3.2808 times higher than in metres

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Distances for smaller things should are always be in either Metres, Centimetres or Millimetres...So Engineers in one country don't confuse those in other countries asked to reproduce the same items, by accidently using different units (which has happened plenty of times in the past).
Weights and measures on the other hand, definitely have to be in Kilograms or Grams & Litres or Millilitres which make far more sense than Lbs and Oz. and Fl/Oz or Cups.