The sign for British pounds (£) is a stylised letter L — for the Roman 'libra'
The £ symbol is a stylised 'L' crossed out to indicate abbreviation — 'L' for 'libra', the Latin word for scales or balance, which was also a unit of weight in the Roman Empire. The British pound was originally a pound of silver in weight, hence the Latin connection. The same root gives us the abbreviation 'lb' for pounds in weight. The sign evolved over centuries of handwritten contracts where scribes crossed through the L to mark it as an abbreviation. The full phrase was 'libra pondo' (pound weight), which gave us both 'pound' and its symbol.
Every time you write £, you're using a shorthand for an ancient Roman weighing system. The symbol on British currency is 2,000 years of abbreviation compressed into a single character.
“The £ symbol is a crossed 'L' for 'libra' — the Latin word for scales. The British pound was literally a pound of silver in Roman times. 'lb' for weight comes from the same root. ⚖️ #OddlyHuman”