'Close to 36 million people live in modern day slavery'

The problem of modern-day slavery is far worse than previously thought, according to a survey by anti-slavery campaign group Walk Free.

The group's latest Global Slavery Index says that nearly 36 million people are enslaved, which it defines as subject to forced labour, debt bondage, trafficking, sexual exploitation for money and forced or servile marriage

The total is 20% higher than for 2013 because of better methodology.

The problem is particularly serious in South and East Asia - with India and China ranked the top two in terms of overall numbers.

BBC World Affairs Correspondent Gary O'Donoghue reports.