that's been in use there for more than 12 centuries and is the world's oldest currency today. The nickname "quid" is believed to stem from the Latin phrase “quid pro quo,” which translates to "something for something."
The UK chose not to adopt the euro, retaining the British pound as its currency. The UK's decision rested on five economic tests that the euro failed to meet. Control over interest rates was a significant factor in the UK's choice to keep the pound.
The British pound is both the oldest and one of the most traded currencies in the world. It is currently the fourth most traded currency in the foreign exchange market, after the US dollar (USD), euro (EUR) and Japanese yen (JPY).
The currency you are probably most familiar with is the British Pound Sterling, which is represented using the symbols £ (pounds) and p (pence), with 100p equal to £1.00. Today's coins are 1 penny, 2 pence, 5 pence, 10 pence, 20 pence, 50 pence, £1 and £2. The notes are £5, £10, £20 and £50.
1. Lebanese Pound (LBP) The Lebanese Pound (LBP) is currently the world's weakest currency. Lebanon's financial crisis, political instability, and declining foreign reserves have contributed to the pound's decline.
The Old English root of both is cudu, "gum or resin." Quid is also British slang for one pound sterling, which may derive from the Latin word meaning "that which is." Order fish and chips in a London pub and you may hear, "That'll be six quid, mate."
The official term for currency in the United Kingdom is the pound sterling, often abbreviated as GBP. The term “pound sterling” would be equivalent to the “U.S. dollar” in the United States (though their exact values differ). If you would like to refer to more than one, the correct plural form is pounds sterling.
£500 is called a "monkey" in British slang because British soldiers returning from colonial India brought the term back, referring to the 500 rupee note that featured a monkey on it, and they applied the name to the equivalent amount in pounds sterling. It's a related term to "pony" for £25, which also supposedly came from Indian currency.
The 'Bob' The term 'shilling' might be derived from a Roman coin called a solidus, or the old English term 'scield'. Eventually, it adopted the nickname 'bob', although quite why remains a mystery. There have been attempts to link its name to the famous politician Sir Robert Walpole.
