My answers to
1)
a) Not to my knowledge
b) No, but for science and engineering – any area where SI units are the standard, it would be foolish to deviate from a global standard.
c) Yes.
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a) No, to both (i) and (ii)
b) I would almost certainly boycott them.
c) (i) Yes some firms will use a confusion of measurements to swindle the public, so while that will be a cost to me, it will be a benefit to a dishonest trader. (ii) No
d) Yes, because I am in my seventies. But in the same way that pretending I am twenty won’t actually take 50 years off my life, this is a wholly retrograde step designed to waste time and take the emphasis away from genuine problems that the country is facing.