People over a certain age do, and that age tends to be different for different units. I'm 40, and 'natively' think in miles; both litres and pints (but not gall

People over a certain age do, and that age tends to be different for different units. I'm 40, and 'natively' think in miles; both litres and pints (but not gallons or fluid ounces); kilos (except personal weight in stones); all of millimetres, centimetres, inches, feet, and metres (but not fractions of inches or things like furlongs or rods); and degrees Celsius (except for outdoor temps which are Fahrenheit). Younger people lose Fahrenheit (no longer used on weather forecasts) and stones, and use pints only for beer (milk in glass pint bottles is now rare). Older people use gallons, hundredweight, fractions of inches, and (especially) pounds and ounces. Everyone uses miles, some people know kms as well. It's basically a bit of a sticky mess, but one with a clear direction of travel. And this announcement is for cheap popularity amongst older voters, who use metric less. The number of items that will be marked in Imperial only is going too be very small, because it'll confuse the young and mean different packaging is needed to sell abroad. A few cantankerous market traders will probably do it, but it's always been legal to give prices for both measuring systems simultaneously so there's not really much of an issue to solve.