“....and the Imperial system is meaningless to me....and expressing everything in two different systems is even more confusing......”
So what's the answer, then?
How long does it take to add "or eleven stones eleven pounds" to "your ideal weight should be 75 kilograms."? And how difficult would it be for you to ignore the last part?
“How many people know the fuel consumption of their car in either miles/litre or KM/litre without working it out?”
And it wouldn’t do you much good even if you did (at least when looking for a new car). Manufacturers now quote an almost meaningless “Litres per 100km” figure. Very handy.
Yes, the BBC is the worst perpetrator. It now uses almost exclusively metric measurements. I’ve even heard them say something like “there’s an 8 kilometre tailback on the M20 approaching Dover”. This is despite no vehicle first registered in the UK having, fitted as standard, a speedometer or odometer having its primary calibration in kilometres (because the vehicle would not receive “type approval” from the Vehicle Certification Agency) and no speed limit or distance sign in the UK displaying anything other than miles (because it is illegal to do so).
The BBC has an obligation to provide its information so it is of use to all its users, not just those who started school after about 1970.
And another thing: why do hamburger joints still sell “quarter-pounders”? Could it be that a “0.1134 kilogrammer” doesn’t quite have the same ring about it? Why do most restaurants still offer an “8 ounce fillet steak”? Why not one of 227grammes (or whatever they determine the nearest round number - more likely 200 than 250)?