Agius, who was serving the UK’s second-largest bank by assets since January 2007, will soon announce his retirement from the bank, according to industry sources.

The UK lender is considering appointing Michael Rake, chairman of BT and currently the senior independent director on Barclays’ board, after the resignation of Agius, and the same move have already been improved by the shareholders.

Recently, the bank was accused and fined by the UK and the US regulators for "systematically" attempting to manipulate the London and euro interbank offered rates for profit.

The UK lawmakers on the Treasury Select Committee have summoned both chief executive officer Robert Diamond and Agius over the issue.

The Libor rate is widely used in the US, the UK and other nations to impact large volumes of swaps and futures contracts, commercial and personal consumer loans, home mortgages and other transactions.