Striking fear into the hearts of toddlers throwing tantrums, Kathryn Mewes is The 3 Day Nanny, one of the UK’s best respected parenting experts. Fronting a show of the same name in which she visits the homes of families with challenging children and gives herself just three days to help parents effect lasting change.Her sterling pedigree began with training at Norland College, which produces world-class nannies who go on to work for celebrities a...