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The bank raised billions of pounds from Middle East investors at the height of the financial crisis in 2008.
The Serious Fraud Office is looking in particular at payments between the bank and Qatar Holding - part of sovereign wealth fund Qatar Investment Authority - which is understood to have made a £2 billion investment.
His biography says: "Antony was Chief Executive of Retail and Business Banking and joined the Barclays Executive Committee in November 2009. Prior to that he had been Chief Executive of Barclaycard since January 2006 where he led a revival in the fortunes of the business."
Antony Jenkins is to replace Bob Diamond as the CEO of Barclays, according to Financial Times journalist Michael Hunter. He is reported to have stepped up to the position after running the company's Retail and Business Banking unit.
Barclays' shares are expected to tumble when the stock market opens after the Serious Fraud Office launched an investigation into payments made between the bank and Middle East investors.
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As far as the banking world goes, Antony Jenkins is about as far from being Bob Diamond as it is possible to be.
Barclays has admitted it is being investigated over payments made at the height of the financial crisis to Qatar.