The Financial Services Authority (FSA) has fined Barclays Bank a record £59.5m for manipulating the interest rates at which banks lend to each other.
Barclays chief executive Bob Diamond and three other of the banks' most senior executives will forgo their bonuses for this year.
Including the record FSA fine, Barclays has agreed to pay penalties totalling £290m to UK and US authorities.
http://www.bbc.co.uk/news/business-18612279
For some history search " planned changes to libor " and look for FT link. That is a big subject where apparently overall trades at stake exceed world GDP.