But whether the cumulative impact of its market rigging was more or less great than UBS's is - I am told - still undetermined.

BBC: Heads may roll at RBS over Libor

Parmalat founder Calisto Tanzi is serving an eight-year sentence on market rigging related to the stunning 2003 collapse of his dairy empire despite his advanced age.

NPR: Knox Case Puts Italian Justice Under Scrutiny

But after the financial crisis they were brought in to fix RBS's investment bank, and the concern is that they did not get to grips with the market rigging that continued on their watch.

BBC: Heads may roll at RBS over Libor