I despair of it. The UK started metrication in 1965, and they still have not got there yet. It is a mystery to me how anybody of my age (b 1968) will never have been taught anything but metric, and yet when I left the country about 10 years ago, they were all arguing about bananas by the ounce, led on by a man who appointed himself the "metric martyr", older than me by only a couple of years.

If you meet people who say they like the imperial system because it is "easier", tell them to picture one pint of water, and then ask them to tell you how many cubic inches that represents. So far, only one person has ever given the correct answer to me, out of probably about 20.

On the other hand, if you repeat the question using litres and cubic cm, only very very rarely do people get it wrong. Even my Mother , schooled in the 40s, knows it.