FSA chairman Lord Turner originally refused to release details of the investigation, claiming it would "add little, if anything, to public understanding of what went wrong".
But after a political outcry, senior ministers including Chancellor George Osborne and Business Secretary Vince Cable are said to have pushed the FSA to be more open about its 18-month probe into the collapse of one of Britain's biggest banks.
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Hide AdMeanwhile, angry shareholders have called on the FSA to reopen its investigation into RBS after Wikileaks revelations that chairman Sir Philip Hampton believed his predecessors had failed in their duties.