Britain's banks will be embroiled in a fresh scandal today over complex financial products which have landed small businesses with spiralling bills.
The Financial Services Authority (FSA) is expected to reveal that it has found evidence of mis-selling as part of a review into the way lenders pushed so-called interest rate swap arrangements (Irsas).
Irsas are complicated derivatives products that may have been sold as protection - or to act as a hedge - against a rise in interest rates without the customer fully grasping the downside risks.
Bob Diamond tonight angrily rejected suggestions that he misled MPs over regulators' concerns about activities at Barclays.
The Bank of England's Paul Tucker told MPs he refuted claims that he attempted to influence Barclays into manipulating the Libor rate.
MPs will be hoping the Deputy Governor of the Bank of England will shed some light on unanswered questions about rate-fixing at Barclays.