the thought of the govt wasting £70,000,000 just so a few tourist don't get confused makes me a bit cross.
Not just Europe, pretty much everywhere is ahead of us.
As for not confusing tourists, I assume you're British and can answer these questions with ease ?
What temperature does water boil at or freeze in the Fahrenheit scale ?
How many ounces in a stone ?
If I have a ton of manure, and an acre of land. How much manure per square foot ?
Maybe you know the number of sq ft in an acre, but it's not a nice number to do mental maths with is it ?
How many horses does it take to generate a horsepower ? (Hint it's more than one)
Can you even guess what a British Thermal Unit might be ? Look on your boiler, it's output might be measured in them. Hint: BTU/Hr
How much fun did you have dividing by the 3600 second in an hour ?
Heat from food is measured in calories which aren't calories, heat from gas in BTUs, electrical devices in Joules, and heat from various other sources in (real) calories.
Any idea how to convert between them ?
Which weighs more, an ounce of gold or an ounce of feathers ?
Actually that's a double trick question, your first answer was probably wrong :)
What the ratio of fluid ounces to dtry ounces.
How many gills in a pint ?
Oh yes, and American & Irish miles, gallons etc are different. Americans have it worse.
So luddite ar they that NASA ends up using truly daft units like microinches. Several whole space vehicles have been lost through errors caused by the clash of units.