Over the last five years the UK, US and other countries have written off billions of dollars in loans to the world's poorest countries in an attempt to make poverty history.

But a small group of ruthless financiers - the vulture funds - have been trying to divert that money into their own pockets. Greg Palast reports on their latest target, Liberia, and on moves by UK MPs, prompted in part by a previous Newsnight investigation, to outlaw such funds.