Similarly, 92-year-old Anne Cox Chambers (No. 32) continues to sit on the board of mega-media company Cox Enterprises, which her father founded in 1898.

FORBES: The Richest Women In America

Mr Sants said it was "no secret" that the FSA and the Bank of England had been arguing on the international Basel Committee and the Financial Stability Board for a bigger increase in the capital held by G-SIFIs or the mega-banks than was desired by regulators from other countries, such as France and Germany.

BBC: Sants: We wanted banks to hold more capital