The Serious Fraud Office (SFO) has launched a criminal inquiry into the alleged rigging of foreign exchange (forex) markets.
The government department, responsible for investigating and prosecuting serious and complex fraud, will consider whether traders benefited from the manipulation of benchmark forex prices.
It comes amid an existing probe by Britain's financial watchdog, The Financial Conduct Authority (FCA), which in October joined other regulators around the world, investigating firms over the potential manipulation of the £3 trillion-a-day forex market - the global market for the trading of currencies.
More top news
Another 24 hours before summer returns.
An eight-year-old boy who had to have both hands amputated as a toddler has been given the world's first double hand transplant.
Texas officials have released video taken in jail of Sandra Bland, the woman found dead in her cell three days after a controversial arrest.