All kids in the UK learn metric, and possibly some imperial (but only as a side thing). There are still things colloquially said in imperial, such as weight and

All kids in the UK learn metric, and possibly some imperial (but only as a side thing). There are still things colloquially said in imperial, such as weight and height, but if you go to a doctor it will be in cm and kg. We're still a bit of a mishmash, but it's not as bad as it might seem from outside.