Did you know? Length of a London Underground carriage (18 m) is 4 x Length overall of a `Finn` racing dinghy (4.5 m)
Number of airports in the United Kingdom (460 )
/fact/number-of-airports-in-the-united-kingdom
Link
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.