Kuroda's approach is that of a former currency diplomat, she said.

The secret scheme would have eased the way to the return of the nation's former currency, the drachma.

Going to work was fun, I didn't really think of it as work, said former currency trader Philip Rands.

The accounts are contra-distinguished by calling the former currency, or Halifax currency, and the latter sterling or British sterling.

Also earlier this month, RBS handed Britain's financial regulator instant messages sent by a former currency trader to counterparts at other banks.