Five of the world's biggest banks are to pay a total of $5.7bn in fines, for manipulating foreign exchange makets.
Barclays is the bank with the most total penalties.
And the UK's Royal Bank of Scotland has also been hit with a huge fine, while Swiss bank UBS has settled with authorities too.
It follows a year-long investigation into the rigging of foreign exchange markets - through which trillions of dollars flow each day.
UK correspondent Olly Barratt reports.
IN: "Barclays….
OUT: ...watchdog."
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UK correspondent Olly Barratt says it's just the latest embarrassment for Britain's financial services sector.
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OUT: ...British banks."
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UK correspondent Olly Barratt says London is key to the story.
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OUT: ...institution."
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