The temptation of St David

It's not often you get a morality tale in the bond markets. But when an obscure line of postal bonds grabbed the attention of traders in London, the conflict of interest that haunts all investment banks came horribly alive. One man decided that his bank's relationship mattered more than short-term gain, and he gave his traders' profits back. Was this the action of a saint, or just good business sense? Steven Irvine reports.