The same bank that told regulators to do one when the UK introduced ringfencing (splitting investment from retail banks). I remember there was a story in a paper that someone from the BoE went to talk to management, the BoE told them that Parliament passed a law saying they had to split, and Barclays responded by implying they wouldn't split and would take down the UK economy if they were forced to...you cannot make this up. It is like the Devil being made Pope.