“Don’t make me tell my life story – it’s too boring,” Nadir Khamissa says with a grin on his boyish face.

Ninety minutes later, he’s still talking about his life, and he was lying about it being dull. Khamissa has made a fortune as a world-class investment banker, lost it on an ill-timed telecoms venture, and recovered to make even more dosh. On the journey came an epiphany that life should be about making a difference, not making money - although only the people with money tend to say that.