This time of year is challenging for families with lively, active children who long to be outdoors. Cold temperatures and biting winds make it hard to stay warm and have fun. Tamsin Brewis, owner of Water Babies Bucks & Beds and Wendy Barclay, action medical research chair in Virology at Imperial College London, debunk myths surrounding winter swimming, and explains why joining a regular swim class with your little one can be a game-changer.