When British Caribbean slavery was abolished across most of the British Empire in 1833, it was not the newly liberated who received compensation, but the tens of thousands of enslavers who were paid millions of pounds in government money. The descendants of some of those slave owners are among the wealthiest and most powerful people in Britain today. Alex Renton explores what inheritance - political, economic, moral and spiritual - has been passed to the descendants of the slave owners and the descendants of the enslaved.