Parenting: How much should you limit screen time?

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How much do you limit your child's screen time? The runner-up of The Fortnite World Cup, which took place this summer, was Jaden Ashman, a British 15-year-old who won nearly a million pounds. Before 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 so what will happen when your child says gaming could win them a fortune, just like Jaden? Tina Daheley talks to Mark Griffiths, Professor of Behavioural Addiction at Nottingham Trent University and Belinda Parmar who campaigns against tech addiction.