Some mistake, surely?

[flying haggis]

We have miles, and miles per hour. My car tells me my average miles per gallon. But we don’t buy gallons of petrol any more. Hmmm.

Just be thankful we don't use the completely confusing L/100km

 

[whereistheceilidh]

Been reading too much Private Eye?

....too much Private Eye.....shurely not.......

 

[JAW911]

20p a foot? how many decades ago was this?

I think you missed the point