Meet the woman who is waging her own war against social media addiction as parents across the country beg for help in prizing kids away from their phones. Justine Roberts, founder of Mumsnet, knows all too well just how dangerous the online world can be for children as millions of British mums visit the forum each day to share horror stories and seek advice. While she welcomes the government's new crackdown on social media for under 16s, Justine warns there's still far more to be done to