Tom Scott: Things You Might Not Know

For 21 Years, No-One In Britain Knew How Long An Inch Was (2020x9)

Air date: Jul 27, 2020

In 1834, Parliament burned down, and the Standards of Measurement were melted or destroyed. So when there's no agreed-upon standard for length: how do you fix it? Also: how you can still publicly check the length of your sandwich.