Former Barclays chief executive Bob Diamond's letter to Treasury Select Committee chairman Andrew Tyrie.
He appeared before the committee last week, the day after quitting his post in the wake of the rate-rigging scandal.
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.