Billionaire Chuck Feeney said he would give away all of his money by 2020 – and he’s done it. An entrepreneur from childhood, he amassed a huge fortune in the duty-free business, before spending it on projects ranging from concert halls in Ireland to AIDS support in South Africa. For many years the money was only given out on condition of secrecy, that his name should never be mentioned in connection with the donations.

Mark Coles finds out what’s driven this unique mission - and what his family think.

Producer: Ben CrightonResearchers: Benita Barden & Beth Sagar-Fenton