Barclays has been fined a record £284.4 million by British regulators and around £1.5bn in total as part of a UK and US settlement with authorities over the foreign exchange trading scandal.
Five banks - including Barclays and Royal Bank of Scotland - were fined a total of more than $5 billion by the US Department of Justice over the manipulations.
Authorities have fined five of the world's largest banks, including JPMorgan, Chase & Co and Citigroup inc, roughly $5.7 billion over manipulation of foreign exchange rates, the US Department of Justice said.
Four of them also agreed to plead guilty to US criminal charges.
UBS AG will plead guilty to rigging benchmark interest rates, the Justice Department said.
Barclays will pay $650 million in criminal penalties and Royal Bank of Scotland $395 million. Each will plead guilty to one felony count of conspiring to fix prices and rig bids for U.S. dollars and euros in the foreign exchange spot market.
Barclays also will pay an additional $1.3 billion to settle with the New York state Department of Financial Services, the US Commodity Futures Trading Commission and the UK's Financial Conduct Authority, authorities said.
As part of the New York banking regulator's agreement, Barclays will fire eight bank employees involved with rigging foreign exchange rates, the New York regulator said.
Calling themselves "The Cartel" or "The 3 Musketeers," traders from rival banks shared information and colluded to move the market prices.
A look at the huge numbers at play in the foreign exchange (Forex) markets as five big banks receive huge fines for manipulating the rate.