The Federal Reserve Bank of New York has released documents that outline efforts in 2008 to highlight problems with Barclays and Libor and press for reform.
They reveal that senior officials at were aware in April of that year of Libor under-reporting at banks.
More top news
Marks and Spencer will become the first UK retailer to add vitamin D to its entire packaged bread range.
An over-the-top 80's action movie parody featuring kung fu Hitler and a David Hasselhoff soundtrack gets almost four million views online.
The government is treating the fight against obesity as a priority, as a new report cautions that one in five cancer deaths is caused by it.