Posted 6.59am: The BBC has seen documents which show that ministers in the last Labour government held discussions with banks about policies which would allow the Libor rate - the inter-bank lending rate - to fall.
On Tuesday, the three-month inter-bank lending rate declined to 4.63% from 4.83% late last week.
This involved day-to-day rigging of Barclays' submission to the mechanism that sets this key inter-bank interest rate.
Mr Wheatley is also conducting a review of Libor, the inter-bank lending rate that has been discredited following manipulation by traders.
The shadow home secretary said it was a scandal no-one has been arrested for the "multi-billion pound" Libor inter-bank lending rate fraud.
Mortgage rates are based off Libor, or the London Inter-Bank Offer Rate.
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Intially, seven banks, including HSBC and Royal Bank of Scotland, were questioned in the U.S. for alleged manipulation of the Libor inter-bank lending rate.
FORBES: LIBOR Liabilities: How litigation will drive down banks profitability for years to come...
David Cameron has, so far, only called for accountability at Barclays to go the very top and for a narrow inquiry into the management of LIBOR - the inter-bank lending rate.
Mr Coogan warned that the bank's efforts had yet to have much effect on the London Inter-Bank Offered Rate (Libor), the main interest rate governing the cost of lending between banks.
There has been a furore over the fixing of the London inter-bank lending rate, known as Libor, which is considered to be one of the most crucial interest rates in finance.
The FSA found evidence that Barclays, sometimes working with staff at other banks, had tried to manipulate Libor (the London Inter-Bank Offered Rate) and its European equivalent Euribor between 2005 and 2009.
At Prime Minister's Questions, Mr Cameron said the manipulation of the key Libor inter-bank borrowing rate by Barclays traders was "outrageous" and those responsible for "spivvy and probably illegal activity" should be held to account.
Which senior Whitehall figure told the Bank of England to tell Barclays that they should get their LIBOR - or inter bank lending interest rate - down?
The growth in cash sent home from America had already slowed in 2007 to the lowest rate since 2000 according to the Inter-American Development Bank.
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