Shadow home secretary Yvette Cooper yesterday called for new laws to be written to better deal with financial crimes such as LIBOR manipulation.
The Telegraph reports Cooper told the party's conference in Manchester all lenders should play by the same "fair rules".
She pointed out no one has yet been arrested for the LIBOR scandal.
Cooper said: “Look at the Libor scandal that emerged this summer. It is a multi-billion pound fraud. People were fiddling figures to get rich, while small businesses paid the price. Yet no one has been arrested.
"We need an end to the double standards. New action and new laws. People need to be able to invest with confidence knowing everyone is playing by the same fair rules."
Financial Services Authority head of conduct Martin Wheatley recommended the creation of a specific offence of manipulating the borrowing rate after he published a report into the scandal late last month.
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