Pressure was mounting on Barclays boss Bob Diamond to step down today, after chairman Marcus Agius announced his resignation.
Labour leader Ed Miliband told Daybreak that Labour made mistakes by not regulating banks under the last government and that Mr Diamond should be held accountable.
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.