It added: “Mr Tucker stated the level of calls he was receiving from Whitehall were 'senior’ and that while he was certain we did not need advice, that it did not always need to be the case that we appeared as high as we have recently.” Mr Diamond, who resigned yesterday, is now expected to use the memorandum to claim that the bank was not seeking to boost profits during the credit crisis by manipulating Libor. He will appear before MPs today to face questions on the banking scandal.