Screenagers: Should you control their screen time?

The runner-up of The Fortnite World Cup was Jaden Ashman, a British 15-year-old who won nearly a million pounds. In the run up to the computer tournament he was spending more than eight hours a day in front of a screen. We know that screen time already causes lots of family arguments. Woman's Hour presenter Tina Daheley talks to Mark Griffiths, Professor of Behavioural Addiction at Nottingham Trent University and Belinda Parmar who campaigns against tech addiction.