Re: Smoking
So how long until metrification is complete in UK?
Never. Once Brexit has returned the UK to 1953 everyone will have stopped using those EU-imposed, new-fangled metric weights and measures.
But on a serious note, I'm not sure there's much in the UK that isn't metric these days. People still use imperial measures in speech, but that's about it really. Speed limits are still in miles for some unfathomable reason - possibly because unbimetreable just sounds ridiculous.