Tony Garnett: Making TV with a radical purpose

The British film and TV producer Tony Garnett died last week, aged 83. In 2016 Stephen Sackur spoke to him about his life and pioneering work which began in the 1960s. The subject matter he tackled included homelessness, illegal abortion and police corruption, and uncovered dark corners in British life. But how much of his motivation came from the dark corners in his own life?