John Whiting of the Chartered Institute of Taxation (CIOT) said this was becoming a regular feature of the tax system.

BBC: Millions more in line for tax rebates

The countries are all subject to U.S. sanction and the U.S. Department of Justice and Federal Reserve say Standard Chartered Bank moved millions of dollars between 2001 and 2007 illegally through the U.S. financial system on behalf of Iranian, Sudanese, Libyan and Burmese entities.

FORBES: Standard Chartered Will Pay Another $327M For Illegal Iran Dealings