Barclays bosses charged by the Serious Fraud Office over 2008 Qatar deals

In a statement, the FTSE 100-listed firm said the SFO has charged it with two offences of conspiring with "certain former senior officers and employees of Barclays to commit fraud by false representations".

Barclays, Varley and Jenkins were also charged with providing unlawful financial assistance.

Mr Kalaris - an American banker living in London - used to lead the bank's wealth and investment management division, while Mr Boath was the former European head of financial institutions group at Barclays.

Barclays said it awaits further details of the charges from the SFO, which has also informed the bank that it has not made a decision as to whether it will also bring charges against it in respect of the loan.

Shares in Barclays opened only slightly lower on Tuesday after the UK's Serious Fraud Office announced criminal charges against the bank and four former executives.

The defendants will appear before Westminster Magistrates' Court on 3 July 2017. The British Financial Services Authority (FSA) regulator had been investigating fees paid by Barclays to Qatar during the 2008 credit crisis.

Varley and Jenkins have also been charged for the October 2008 capital raising as well as for unlawful financial assistance. Since the financial crisis, Barclays has faced probes ranging from the rigging of key benchmark rates to more recent scandals related to how executives dealt with whistle-blowers. "As one might expect in the challenging circumstances of 2008, Mr. Jenkins sought and received both internal and external legal advice on each and every subject mentioned in the accusations leveled by the SFO today", said Brad Kaufman, Jenkins' US based lawyer at Greenberg Traurig.