On Friday, Oliver Wyman completed the more granular audit, which only seven institutions passed ( Banco Santander, BBVA, Caixabank, Unicaja Ceiss, Bankinter, Kutxabank, and Sabadell).

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There is no evidence of any other interviews with audit firm leadership or audit engagement partners for the failed institutions.

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PwC would also know how widespread the practice was amongst some of the systemically important financial institutions, since they also audit Bank of America, JP Morgan Chase, and AIG, as well as the Federal Home Loan Banks and Freddie Mac.

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The Foreign Office and the Cabinet Office are overseeing the audit, which will seek written evidence from businesses and EU institutions.

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Tarrin is accused of engineering the Finance Ministry's takeover of Krung Thai Bank from the Financial Institutions Development Fund in the wake of last year's leak of a PricewaterhouseCoopers audit report that exposed allegedly poor lending practices at the bank.

CNN: Taking the Heat